HTC HD2 Not Working!! - HD2 General

I bought the HTC HD2 when it first came out and i absolutely loved it!! however I had to get rid of it because I needed the money for an emergency. however I just came upon someone who was selling the HTC HD2 for a reasonable price. and I bought it in a rush because I have missed the phone and wanted to get started playing on it right away!!
BUTT
It doesnt work.. im guessing its water damaged because whoever sold it to me took out all the water damage stickers. So.. heres what happens. When i plug it into the charger. The Flash comes on for about 5 seconds and either the buttons light up or the phone vibrates until i take out the battery.
I know I was stupid for buying the phone without checking it. So flame flame flame ALL you want. I just want this fixed!!
btw. The guy i bought it for wont answer his phone so just screw it.
thanks

Oh wow. im noob.. I havent been on here for so long that i forgot the rules of the forum!! could someone help me re-title or just delete post? once again. i apologize.

Ok first just click on the edit button at the bottom of any post of yours to edit it. To edit the title just click edit on your first post and then click advanced and then you can edit the title.
As for your problem can you get to the red, blue, green, and white booloader screen by holding the volume down button down and while you power your HD2 on?
If you can get to bootloader then flashing might help buit it really sounds more like a hardware problem.
Check your battery pins and make sure none of them are slightly bent. Also very very lightly wiggle each pin just a little then try to boot the phone.
If you can not get to the bootloader or even get it to the first splash screen, and by that I pretty much mean get it to even light up the sceen showing it did turn on then it is bricked.
Post back with the results as I can put you in touch with someone to JTAG it if it is bricked.

Thank you so much!!
No.. the screen actually doesnt not light on or anything.
I have noticed the the battery pins were slightly bent and when i wiggled it a little and then put the battery back on Its started vibrating but the screen still doesnt light up

I sent you a PM with info on who to talk to about JTAG. Soprry someone sold you a bricked HD2.

if it's really water damage, then i don't think it's jtag fixable.
jtag is being used when you have a corrupt bootloader that cannot start the phone. The bootloader resides at the beginning of the nand memory, after something called steppingstone (a small - about 4kb portion of memory that is loaded into ram memory and then executes the bootloader program).
So when you use jtag, you invoke another thing, called watchdog, a CPU function, that once invoked, will halt loading the steppingstone into ram memory. Once this is done, the phone will remain in "service mode" until the next restart. With jtag, you can load the bootloader back into nand memory at it's corresponding address and then normally flash the phone.
But, jtag requires you have a working cpu, ram and nand memory because basically jtag does at a more "lower level" what you do when you flash the phone. If your hd2 suffered some water damage, i doubt (based on what you say it's been doing since you tried to start it) that it can simply be restored by jtag.
The phone should first be disassembled and it's motherboard be cleaned by a powerful solvent in a ultrasonic cleaner. If the phone was dropped in a salty or sugary kind of liquid, although the water in it will evaporate, the salt/sugar will dry up and remain in crystal state among the pins or connectors of the motherboard. Both salt/sugar are electrically conductors so the phone's normal operations will be affected by various short circuits between pins or such stuff. If you're lucky, cleaning will solve the problem, if not.. the motherboard could be damaged physically because of those short circuits.

facdemol said:
if it's really water damage, then i don't think it's jtag fixable.
jtag is being used when you have a corrupt bootloader that cannot start the phone. The bootloader resides at the beginning of the nand memory, after something called steppingstone (a small - about 4kb portion of memory that is loaded into ram memory and then executes the bootloader program).
So when you use jtag, you invoke another thing, called watchdog, a CPU function, that once invoked, will halt loading the steppingstone into ram memory. Once this is done, the phone will remain in "service mode" until the next restart. With jtag, you can load the bootloader back into nand memory at it's corresponding address and then normally flash the phone.
But, jtag requires you have a working cpu, ram and nand memory because basically jtag does at a more "lower level" what you do when you flash the phone. If your hd2 suffered some water damage, i doubt (based on what you say it's been doing since you tried to start it) that it can simply be restored by jtag.
The phone should first be disassembled and it's motherboard be cleaned by a powerful solvent in a ultrasonic cleaner. If the phone was dropped in a salty or sugary kind of liquid, although the water in it will evaporate, the salt/sugar will dry up and remain in crystal state among the pins or connectors of the motherboard. Both salt/sugar are electrically conductors so the phone's normal operations will be affected by various short circuits between pins or such stuff. If you're lucky, cleaning will solve the problem, if not.. the motherboard could be damaged physically because of those short circuits.
Click to expand...
Click to collapse
Thanks for that great explanation facdemol! I have never JTAGed a device before so I did not know about the Watchdog fuction. I also did not know about the Steppingstone I thought the IPL loaded the SPL which is pretty much the what bootloader is, I know it is more to it then that but that is just to generalize it. Or is the IPL what you are callin g Steppingstone?
Anywqay you are probably right about if it is truly from water or some other liquid damage. But since the OP is not 100% sure that is the cause I would suggest trying JTAG first and if that does not work then just replace the the main board cause not everybody is as good at DIY as you are man.

Related

8525 dead after program removed!!!

I was removing iGuidance v3 and in the middle of it, the phone turned off. Thought I just hit the power button to turn off screen and press power again. Nothing. Thinking it just crashed, I held down power button, nothing; removed battery and replaced it and hit power, nothing. Put it on the charger and it doesnt have any lights showing its charging.
The phone is less than 6 months old, could it be the battery? What should I do? any help here appreciated.
Have you tried a reset press and hold both the side OK button and the power button and then press the reset button by putting the stylus into the hole in the bottom of the device.? This takes sometimes more try's.
Now do a soft reset (again put your stylus in the hole on the bottom of the device, dont press any other buttons).
Mostly this should do the trick!
Ok, replaced battery today and still no power nor charge. So how do I reset? Hold power and ok button down and then replace stylus in hole? Do you mean the ok button on the side or on the front?
You may want to do a HARD reset, not a soft one.
Tried hard and soft resets by putting stylus in pin hole. No luck, think its toast. Also tried the battery in/battery out trick while on charge.
Ive heard of phones crashing or being bricked after a bad rom install or taking off usb too soon, but removing a program and it dying is different. Never had any issues with this phone. Is there a way to test it w/ a multimeter to see if mobo is bad?
What about replacing the little round battery thats on the mainboard? Would that do anything?
Isn't it still covered under warranty? If so, just have them fix or replace it bro.
No warranty. Replaced the screen myself a long time ago.
I just got an email from HTC telling me basically how to preform a hard reset. Well it didnt work. My phone is a paper weight now. Ive never had to do a hard reset before. Used Memaid to do the soft reset all the time. Ill keep trying and fix it eventually by either replacing the mainboard or digging deeper for a fix. Thanks for help everyone
Just got an email from HTC help:
"Dear Customer,
Thank you for contacting HTC America.
For repair inquiry, please contact our repair center at 1-888-354-2375. They will provide you with all the info rmation that is needed for the process of repairing. They will provide you with a RMA number. After that you can send in your phone for further diagnosing. After analyzing, they will determine if it’s in warranty or out of warranty. If it is in warranty, they will repair and return the unit. If it is out of warranty, they will contact you to secure a payment. If you have any questions or concern after you send in your phone, you can call the repair number again to check on the status.
For troubleshooting, please call 1-866-449-8358. If you would like to purchase any accessories, please contact our accessories department at 1-888-716-3594.
I hope we have answered your question in detail. Feel free to contact us again if you have any further questions.
Best regards,
Michelle Pham
HTC America CSR"
I called the number for troubleshooting first and was told that this isnt a fix that anyone can do on their own. It must be sent in for further analysis. What was interesting about the conversation is when I asked if he had ever heard of this problem before. He said he gets that problem all the time with these models. Ive never of this happening. Never found any other posts about it either. I bet its a problem with the phone holding a charge on the mainboard, like a faulty capacitor most likely its gonna have to be j-tagged at the repair center.
Hi
I don't think this is a very common problem as they say. Yes, there are many reports of the failing to charge issue and stuck on the red LED light, but only a tiny number of absolutely dead devices.
Curiously, the service manual refers to an on-board fuse. But later states that when this is blown that those without board level repair authority should "replace the m/board". Clearly then, this is either not a fuse in the ordinary sense of the word or refers to any component that may be "blown" and would require detailed tests to track the problem.
Just for info: the m/board is not a basic simple one in terms of soldering / component removal and replacement. Speaking personally, I would not attempt anything more than very basic work on this board - perhaps just on some of the "cruder" connections here and there. Boards in these types of phone make the more typical boards in other electrical equipment look like ironmongery.
Mike
Ive examined the mainboard and looked it over very carefully for any burnt resistors or capacitors. Nothing out of the ordinary. The components would be a huge project to replace, their soooo small, only the mini USB charger port could actually be done by hand.
What would the fuse look like? Is it soldered to the board? I see a small round battery near the PTT button. Is this something that can be replaced? Probably messes up the BIOS when removed like a computer motherboard.
I shouldnt have been so quick to sell off my Wizard before this happened.
often fuses are no longer used, they use a for example 1 Ohm resistor of limited power rating instead.
You might try to follow the current on the mobo while the charger is connected, see whether you can locate the disconnecting (faulty) part.....but the size of the components makes this a very difficult job....my gues would be that the problem is located near the power entry/regulator if nothing goes, meaning no action while on battery nor w the charger connected.
marcelnl said:
often fuses are no longer used, they use a for example 1 Ohm resistor of limited power rating instead.
You might try to follow the current on the mobo while the charger is connected, see whether you can locate the disconnecting (faulty) part.....but the size of the components makes this a very difficult job....my gues would be that the problem is located near the power entry/regulator if nothing goes, meaning no action while on battery nor w the charger connected.
Click to expand...
Click to collapse
But these are multi-layered boards, it will be very hard to trace a connection on it.
Ok, so I lost my motherboard. Probably something killed it during the whole uninstall process. Made peace w/ that. Maybe bury it in the backyard or something. LOL
I bought it to replace my aging 8125, but wonder if I did it for the wrong reason. I thought the new processor would be way faster, but it really wasnt that fast. 8525 has a nicer housing, camera and 3G (which i never used), A2DP that doesnt skip. Never even used the pre-installed programs like Mobi-TV, Telenav, etc.
Anyways, anyone think a 8125 motherboard will fit in a 8525 housing?

AT&T powers off after drop

I have been using AT&T 8525 for about 5 months now. Dropped it in office a week back and it was on an uncarpetted surface. No external damage but it powered off. I had to try for a while to power it on but eventually it did power on.
Since this event it just powers off on its own. Right now, even minor jerks cause it to shut down. When you pull the phone out of your pocket after a while, it has already shut down!!! Took it for repair to a local cell phone repair assuming it might have some connector damage but they could not figure out the problem. They opened it, cleaned the interiors (as it had dust build up) and according to them everything appeared normal.
What would you guys recommend? It is running Schaps 4.30. I see that HTC has a repair service in US.....had anyone tried that?
Sounds like battery might be a little bit loose... Jam something in behind the battery to make sure of constant connection... You're not the first with this complaint. The battey terminals may have been bent back just enough to cause this intermittant problem, especially when it gets jolted, the battery disconnects from the teminals causing an automatic shutdown due to no power.. Just thank god you didn't break the terminals off. Sometimes can be fixed but if the break is at board level, you may as well sell it off on ebay for parts because its just about impossible to fix then.
Cheers...
Very smart ultramag!! Your reply made me think what I did after it fell down. At that time I did think that the battery was loose as it was running when on active syn (powered by laptop) but not when I removed the cord. I did turn the terminals a bit and it powered on after few attempts (the drop must have given the circuitry some shock to recover after sometime).
I have jammed a paper on the side of the battery opposite the battery terminal. Will report back in a day or two if it still gives any problems. That should help others with the same problem.
Also this event has taught me that invisible shield (the plastic shield that we stick on) perhaps may not be the best protection. Case is a must to absorb the shock!
ok the problem still continues despite sticking a paper on the battery side (opp the terminal). I do believe that the battery was part of the problem. Before sticking in the paper, it used to give me a Red LED for few seconds when I attempted charging and then turned to amber. Now that problem is not there....it turns to amber right away on plugging in the device.
So part of the problem is addressed but the Hermes still powers down on its own when subject to minimum shock (in your pockets and you are walking around in the office or driving a car). What do you suggest? Should I send it in to HTC? Are they good about addressing repair issues?
... and yet I think it probably is the contacts as suggested above. It may be that it's a little more than just the contacts not pressing firmly on the battery though. There have been cases where a fall has actually broken/cracked the solder joints between the contacts and the board. A trickier thing to fix unless you have some skills in that direction.
Mike
AT&T powers off after drop - HTC's take on the situation
Ok so here is HTC's evaluation of the situation.
They want to change the main board (mother-board I guess). In addition, though the phone is just 4 months old (was purchased refurb from AT&T) and has barely any scratches, they would replace the casing, the keyboard and the structure that holds the keyboard and LCD. And they would ONLY charge me $272. Isn't that ridicuously amazing??
To me it seems they can't figure out what the hell is going on, so lets just go ahead and replace a bunch of things and one of them should be a hit.
I have asked them to send the phone back. Mike, do you think the main-board could be the issue? Any recommendations of who I could try for repair.....or what I should ask the repair guy to look into to find out if the main board is the issue or not?
Only $272??? Good God! That lot would cost you around $450 if it were fixed at HTC UK!!
If the drop caused cracking internally then that may be why they want to replace the rest. if there are known defects that are not repaired, they cannot guarantee the repair and so will not do it at all if you do not agree to the whole thing.
of course, you could be right and they have no clue and simply want to replace everything and hope something gets fixed....
Don't PPCtechs also do repairs on that side of the pond?

HTC is turning off :(

Hello everyone! I have problem with my phone because sometimes is turning off without any reason, I bought brand new battery and is still same when is switched off and I want to put it back on i must take off battery for couple of minutes, then put battery back and then switch on anybody know whats happened?? And how to fix it!!
It's the most standard problem with htc models touch and elf...
This problem is hardware based! in this condition there are only 2 things you can do:
1.send the device to a htc service center and get the motherboard changed for $300+ if you are out of warranty.
2.Or open the mobile and put a piece of thin plastic in between the omap prosessor chip and the steel piece tha goes over it and then put the second cover on top in order to apply pressure to it because the solder pins that are in between the cpu and the mobo are not connecting properly and lose contact so the phone goes off or freezes then goes off and some times stays off. Make sure that there is enough but not to much pressure applied to it! it worked for mine but i did it because it was out of warranty... its a temporary fix but if you are gentile to it after it will surely work for a few more months...
IF YOU HAVE NEVER DONE SOMETHING LIKE THIS BEFORE OR YOUR TOUCH/ELF IS STILL IN WARRANTY DO NOT TRY IT!
I will post a pic that i took when i did mine if anyone is interested... Let me know...
Thanks for reply!
Uff.... first way to fix it is a little bit too expensive! And 2 way to do it seems quite easy, so i try to do it this way Could you add any picture of this and just tell me how to open this phone?
Many thanks!
@Firestarter42
Thanks man!!!!
did what you said, the plastic trik, and the phone is back to life (it was totally dead and didn't charge) you save a life today!!!
I had the same problem untill one day when he didn`t want to turn on and now i do not know what to do with it how to make it work again
Dear Sir,
I have just tried method 2.
My elf didnt have a metal cover on the processor, lol... got it used from someone... or should I say abused? lol
anyway, I hope it works. will update...
here's a link for the demonstrated tutorial:
http://forum.xda-developers.com/showthread.php?t=476152
Thanks a lot again.
I haved the same problem.....and i realize after many times that I didn't change my ipl and uspl!!!so my cocked rom frequentely turn off my device!!!now it's all right!!!!!!!
i had the same problm too....
it kept turning off and just a few weeks ago it would never turn on...
i did try that trick of keeping the plastic thingy on the omap processor ... it worked for a few weeks max after tht it happened as above
finally took my phone to htc.. told them it was gift and i dont have the invoice... actually purchased frm ebay for 150$ .....
they checked it was in warranty,.. they replaced the board... hurray... my elfin is alive again.. and in wm6.1
hope htc fixes this crap issue as many face this problem
My HTC elf was freezing, rbooting and so on, i was thinking that it was a windows/flash/third party programs problems ....
BUT I confirm that the method "open the mobile and put a piece of thin plastic in between the omap prosessor chip and the steel piece tha goes over it"
brings my htc elf to life again ... stable !
(i've done it with a metal piece and not plastic.)
Thanks for the advice !!!!
my elf was freezing and turning off so i try this 2. method and it works, and elf is much faster then before in my case...
I've never had this problem before but this week my phone switched itself off (so had to boot up again) a couple of times. I did try a new custom rom but I've also been using a different charger (USB mains adaptor) and a replacement battery (this seems to be a poor replacement battery which seems to make up the battery level.
So I don't know what was causing it. For some reason, removing the SD card and re-inserting it seems to have done the trick for now but I'll keep watching it.
Hi guys
My phone is, usually at night when there is no use, switching the screen off, the earphone green indicator flashes but the phone will not turn on when I press the power button, I have to do a soft reset each time to get it back on again (even though it appears to be on with the flashing green light). I cannot get calls or text and my alarm fails to sound. Have overslept a few times now!. Also, its battery has gone for a ball of ^&*%. Will this trick help? Thanks a lot!
Turn off as in literally 'poof!' or, it will restart?
The only way to get it to restart is to do a soft reset, or remove and replace the battery. The phone's green light will flash but there is no way to the screen to activate or use the phone - make calls, use the alarm, receive etc. The screen stays black, no use trying the power button either...
Firestarter42 said:
It's the most standard problem with htc models touch and elf...
This problem is hardware based! in this condition there are only 2 things you can do:
1.send the device to a htc service center and get the motherboard changed for $300+ if you are out of warranty.
2.Or open the mobile and put a piece of thin plastic in between the omap prosessor chip and the steel piece tha goes over it and then put the second cover on top in order to apply pressure to it because the solder pins that are in between the cpu and the mobo are not connecting properly and lose contact so the phone goes off or freezes then goes off and some times stays off. Make sure that there is enough but not to much pressure applied to it! it worked for mine but i did it because it was out of warranty... its a temporary fix but if you are gentile to it after it will surely work for a few more months...
IF YOU HAVE NEVER DONE SOMETHING LIKE THIS BEFORE OR YOUR TOUCH/ELF IS STILL IN WARRANTY DO NOT TRY IT!
I will post a pic that i took when i did mine if anyone is interested... Let me know...
Click to expand...
Click to collapse
Thankx your solutions worked out with my HTC Touch and i get replaced omap processor
power problem on Elf (not the usual)
hello guys, i have an Elf T-mobile that someone "lost" i found it, but was bricked...i unbricked following the awesome guides on the forum and installed on it the original italian rom (obviously am not german)
but...here's the problem, when i press the power button (should get it into stand by mode like every pda does) or also when goes on stand by itself, just shuts down !!!
then the pda auto soft resets, until the end...doesn't have the "auto power off problem" like i readed on the forums...however it tried but didn't solve the problem
i think is a problem with the radio, or the IPL or SPL (i tried 1.11.0002 IPL and 1.11.000 SPL...then 2.2x.xxxx IPL and SPL...now i tried 3.14.0002 IPL and 3.14.0000 SPL, also tried different radios...
but the problem remains...
EDIT: Problem solved, changed the little battery in the motherborad, it worked for me
help
Firestarter42 said:
It's the most standard problem with htc models touch and elf...
This problem is hardware based! in this condition there are only 2 things you can do:
1.send the device to a htc service center and get the motherboard changed for $300+ if you are out of warranty.
2.Or open the mobile and put a piece of thin plastic in between the omap prosessor chip and the steel piece tha goes over it and then put the second cover on top in order to apply pressure to it because the solder pins that are in between the cpu and the mobo are not connecting properly and lose contact so the phone goes off or freezes then goes off and some times stays off. Make sure that there is enough but not to much pressure applied to it! it worked for mine but i did it because it was out of warranty... its a temporary fix but if you are gentile to it after it will surely work for a few more months...
IF YOU HAVE NEVER DONE SOMETHING LIKE THIS BEFORE OR YOUR TOUCH/ELF IS STILL IN WARRANTY DO NOT TRY IT!
I will post a pic that i took when i did mine if anyone is interested... Let me know...
Click to expand...
Click to collapse
can any one provide some sought of tutorial for this please
thanks
ishaan_chd88 said:
can any one provide some sought of tutorial for this please
thanks
Click to expand...
Click to collapse
I'm presuming you mean for option 2, as 1 is quite obvious
Anyways, I haven't done this, but I am posting my best guess (untried, untested, just a theory).
Open your phone up and completely dissamble as described here. Completely strip it down so you only have your mainboard. Clearly take all the necessary precautions before hand (backup, etc etc.)
When done, you will see there are blank shields above where the chips will be, if you look, you can see little dimples, you can ease these off here. This will get you into where the omap processor is. You can then put the plastic on top, and make sure it is done as described. Should literally be a case of putting it all together and hoping for the best after that. I will have a look at some point (can't promise when) and see if I can take some photos of where this will go etc.
An alternative would be to try and reflow the joints of solder with a heat gun... very dangerous considering how tight the components are packed in, and overkill.
captainstu72 said:
I'm presuming you mean for option 2, as 1 is quite obvious
Anyways, I haven't done this, but I am posting my best guess (untried, untested, just a theory).
Open your phone up and completely dissamble as described here. Completely strip it down so you only have your mainboard. Clearly take all the necessary precautions before hand (backup, etc etc.)
When done, you will see there are blank shields above where the chips will be, if you look, you can see little dimples, you can ease these off here. This will get you into where the omap processor is. You can then put the plastic on top, and make sure it is done as described. Should literally be a case of putting it all together and hoping for the best after that. I will have a look at some point (can't promise when) and see if I can take some photos of where this will go etc.
An alternative would be to try and reflow the joints of solder with a heat gun... very dangerous considering how tight the components are packed in, and overkill.
Click to expand...
Click to collapse
thanks man but i guess am so dumb that am not getting where is this processor located anyways currently my phone is working fine but in few days I'll get the tools & open it...let see than
if you can arrange any pic of processor(where we have to fit plastic) it will be extremely helpful...
anyways thanks for helping
tc
where to get small battery on mother board

[Soldering?] Move internal memory chip

Hello lovely people.
Not long ago, my wonderful Samsung Galaxy S2 dropped dead. Before I send it in for service, I would LOVE to get the data on the internal storage back.
The phone does not get hot while charging, and nothing else whatsoever makes it show sings of life.
Is it possible to swap out the internal storage chip from the motherboard, and place it on an another identical phone, and retrieve the data that way?
Any sort of tips for businesses that would do something like this is welcome!
As you can guess, I learned to back up my stuff the hard way. My last clockwork backup was 20 days ago. Precious 20 days ago
probability = 99,99% yes ... a SD-card no matter of where it was before. have good luck
psytr0nic said:
probability = 99,99% yes ... a SD-card no matter of where it was before. have good luck
Click to expand...
Click to collapse
And the deadly .01% is if the damaged part is the internal memory itself.
:good:
While emmc chip got like 20 important pads to solder (out of even hundred, when most are there being N/C) it is still BGA. A ****ass small BGA covered with glue. That would require someone really experienced with reworking such things. I do not know the prices but I would be prepared to pay even 100$ or more for such job, done right.
That from HW level. From SW+HW look: in theory there should be no trouble with properly swapped emmc ic from other phone. But you shall not forget about the said 0.01%, maybe more - reworking such chip might have influence on its content (I might be wrong) + GS2 had the emmc hardbrick bug - how did it die?
Please let us know how did it go.
Oh and btw - there must be companies working on such data recovery with proper HW to wire up to the unsoldered chip with sort of socket or other hackaround - I'd lookup there.
Max specified operating temperature of an eMMC is about 85 °C, there's no telling what happens above that... So whatever way you use to re-connect your eMMC, make sure it is not by soldering!
Of course it is possible but you need highly expensive tools for it to solder of the chip. it is BGA it's not just like a transistor..
It does have hundreds of micro balls under the chip. Did you try adb shell already? Or is it really 99% dead.
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You may find a company that can do it but it will cost A LOT of money. Because you need special tools for it.
Something like this
You best bet would be to try to use a heat gun on the main board. Just heat it up for a few seconds and cool it down to zero as quick as possible. Maybe the bga is cracked because it got hit by the ground when you accidentally dropped it. By heating it up you may temporarily fix this crack(will also cause slightly damage to the chips) in the soldering. So you can back it up and sent it back. I think it will void the warranty, but you have to decide for yourself what to do. Try to get back the data or get a new working main board from Samsung (if you sent the phone back they will just replace it with a new one most likely).
Bga soldering crack
0,1% of chance .. playing with Samsung EMMC chip = bye bye phone . look around forum or elsewhere 100% of bricked is due to it .
Question : what make you confident to say that your internal memory is good ?
to remind : it is also your phone flash chip which manage boot sequence and all . don't forget it .
Max specified operating temperature of an eMMC is about 85 °C, there's no telling what happens above that.
Click to expand...
Click to collapse
Of course it is possible but you need highly expensive tools for it to solder of the chip
Click to expand...
Click to collapse
every time I tried with hot air , I removed chip with missing pads cause of glue under chip which make hard to remove .
why not to give a try ? have good luck
You best bet would be to try to use a heat gun on the main board
Click to expand...
Click to collapse
Those are options you have instead of paying hundreds of euro's to a company that can recover it if it isn't the nand/emmc itself that is the dead part of the phone.
Of course i recommend him to go to a professional company and let them do recover it. Because they will do it the proper way but like i said before it cost you a lot of money.
So your best bet would be to try it yourself or just sent it back to Samsung for warranty.(by trying yourself i don't mean to solder it off because thet will not work out good. It will probably kill the chip, just try to reflow the mainboard and maybe you have luck.)
I know about glue in the corners of bga based chips in HP & Acer and other brands in laptops and such but didn't know that phones had that too.
But glue under the chip, never seen that before. And btw you cannot remove a bga soldered chip with a heatgun you need ir so that the whole surface under the chip gets loose. And you need to cover up all other components or they will get loose too or fry
Acer bga soldered chip -> glue in corners (this is not nand or emmc, its the chipset & cpu/gpu)
http://i.imgur.com/aIHNu.jpg
Irda soldering
http://www.youtube.com/watch?feature=player_detailpage&v=RrA-trDZPNs#t=170s
Recovering data from snapped Galaxy s2 motherboard
Hi everyone, i really need some help
My galaxy s2 motherboard has snapped (around the long thin bit) with all other parts of the motherboard still intact. I really need to recover all of the data. The data has sentimental value and cannot be replaced. Is there any chance of recovering the data either through chip extraction and onto new board? Can the existing motherboard be fixed?
All i keep hearing is that it is too difficult, the motherboard is multi-layered and would be impossible to fix. I am reluctant to take this as an answer. Is there anybody out there that has a solution for recovering all the data? Who would i go to? who do i pay? Ive contacted samsung and they say it is impossible, when questioning them why it is impossible they state tit would cost too much and they cannot do it.
Please help. thank you.
EMMC reball and some other tips
Hey guys,
I know this thread is a little bit old but I'll try to give in my 2 cents maybe someone here may find it helpful
So I come from background where I do around 20 bga reballs per week, so I do know a thing or two I guess about this although my knowledge on Samsung platform is relatively low compared to an iphone logic.
So to begin with replacing the emmc chip alone is not enough as you'll need a programmer box which connects to a jtag interface which is able to rewrite the initial files like bootrom to the emmc. You can find these boxes at any prominent gsm repair shops; boxes named such as RiffBox or Z3X Samsung box are the best I found recently.
Having said that before any repair is attempted by mainly removing the flash chip it is imperative to try to resurrect the phone using these said boxes, to try to find whether or not the NAND chip is actually detected. As one may have simply installed a ROM which is not compatible with the phone and all that is required is to rewrite the bootrom files. If the NAND (basically the same name as a flash chip) fails to be detected then obviously something went wrong and it either could be the NAND is burnt inside, or the NAND has some cracks under its critical ball pins or even may be a problem that the main power management chip inside the phone is failing from supplying usually around 3V to power up the NAND.
The emmc chip at least found in a samsung is a 14 by 14 pins which only about 1/3 of it's pins are critical, the rest are dummy and do not worry if they eventually get removed, while removing the chip or cleaning the board after desoldering prior installing the new chip.
Some tips on reworking:
Always cover critical glued components like CPU + POP (package on package) RAM, baseband processor usually XGOLD found in Samsung.
Clean surrounding chip glue before attempting to remove by giving around 250C of heat and with a needle scratching the glue around
Do not exceed more than 350C to remove the actual chip to prevent more damage to the built in tracks inside the motherboard.
Last and not least a schematic for your phone would always be a lot of help to help you detect what voltages are missing on bootup to make sure that the boot up sequence is starting fine and also the relative points of each pin under a chip while knowing which pins are critical and which are dummies, or NC (not connected)
If you need any help you can always message me and I'll try my best to answer your questions.
Regards,
Ryan
solder with care
Solder with care mate, else it will be totally gone
psytr0nic said:
0,1% of chance .. playing with Samsung EMMC chip = bye bye phone . look around forum or elsewhere 100% of bricked is due to it .
Question : what make you confident to say that your internal memory is good ?
to remind : it is also your phone flash chip which manage boot sequence and all . don't forget it .
every time I tried with hot air , I removed chip with missing pads cause of glue under chip which make hard to remove .
why not to give a try ? have good luck
Click to expand...
Click to collapse
The glue in samsung is very easy to remove you just need to heat the board up to 250C and gently scratch the glued area with a needle. Do not worry on the removed pads as 1/3 of the pads under the EMMC are not connected and therefore not needed. Always clean the chip from the glue and use leaded solder for best shiny connections.
If you need any help you can always message me and I'll try my best to answer your questions.
Regards,
Ryan[/QUOTE]
Can you please explain more about JTAG.., types and the connections, how to get files for the different phones, where can we get the software etc. Thank you.:good:
richie16171 said:
If you need any help you can always message me and I'll try my best to answer your questions.
Regards,
Ryan
Click to expand...
Click to collapse
Can you please please explain more about JTAG.., types and the connections, how to get the files from different phones, where can we get the softare etc. Thank you.:good:[/QUOTE]
You will need special programmer boxes like riffbox to be able to rewrite the bootloader. JTAG is a dedicated space on the board where the riffbox will communicate with the phone.
AnArChYm said:
Can you please please explain more about JTAG.., types and the connections, how to get the files from different phones, where can we get the softare etc. Thank you.:good:
Click to expand...
Click to collapse
You will need special programmer boxes like riffbox to be able to rewrite the bootloader. JTAG is a dedicated space on the board where the riffbox will communicate with the phone.[/QUOTE]
Thank you., what about the riffbox connections? Which pin to connect what and is it common to all devices?
richie16171 said:
You will need special programmer boxes like riffbox to be able to rewrite the bootloader. JTAG is a dedicated space on the board where the riffbox will communicate with the phone.
Click to expand...
Click to collapse
Thank you., what about the riffbox connections? Which pin to connect what and is it common to all devices?[/QUOTE]
Edit: I already got the site. And everything is explained in forum there. If anyone wants.. you can find here http://faq.riffbox.org/showcat.html
Would like the learn how to reball
AnArChYm said:
Hey guys,
I know this thread is a little bit old but I'll try to give in my 2 cents maybe someone here may find it helpful
So I come from background where I do around 20 bga reballs per week, so I do know a thing or two I guess about this although my knowledge on Samsung platform is relatively low compared to an iphone logic.
So to begin with replacing the emmc chip alone is not enough as you'll need a programmer box which connects to a jtag interface which is able to rewrite the initial files like bootrom to the emmc. You can find these boxes at any prominent gsm repair shops; boxes named such as RiffBox or Z3X Samsung box are the best I found recently.
Having said that before any repair is attempted by mainly removing the flash chip it is imperative to try to resurrect the phone using these said boxes, to try to find whether or not the NAND chip is actually detected. As one may have simply installed a ROM which is not compatible with the phone and all that is required is to rewrite the bootrom files. If the NAND (basically the same name as a flash chip) fails to be detected then obviously something went wrong and it either could be the NAND is burnt inside, or the NAND has some cracks under its critical ball pins or even may be a problem that the main power management chip inside the phone is failing from supplying usually around 3V to power up the NAND.
The emmc chip at least found in a samsung is a 14 by 14 pins which only about 1/3 of it's pins are critical, the rest are dummy and do not worry if they eventually get removed, while removing the chip or cleaning the board after desoldering prior installing the new chip.
Some tips on reworking:
Always cover critical glued components like CPU + POP (package on package) RAM, baseband processor usually XGOLD found in Samsung.
Clean surrounding chip glue before attempting to remove by giving around 250C of heat and with a needle scratching the glue around
Do not exceed more than 350C to remove the actual chip to prevent more damage to the built in tracks inside the motherboard.
Last and not least a schematic for your phone would always be a lot of help to help you detect what voltages are missing on bootup to make sure that the boot up sequence is starting fine and also the relative points of each pin under a chip while knowing which pins are critical and which are dummies, or NC (not connected)
If you need any help you can always message me and I'll try my best to answer your questions.
Regards,
Ryan
Click to expand...
Click to collapse
Hi Ryan,
My son's galaxy s3 i9300 was inadvertently given a spin in the washing machine. When I realised what had happened I took it apart into its various components and put it in rice for a week. When I switched it on everything worked except the cell phone signal. From what I can gather the eMMC chip has been damaged and no software can fix it. I don't have it with me now but I think IMEI and baseband is unknown. The EFS folder is empty or corrupt.
Stumbling across your post I was interested in the fact that you seem to be an expert in re-balling. My son has since got a new phone and since I am a basic amateur in phone repair (for family and friends) I have been toying with the idea of replacing the eMMC chip on the s3 after watching this video:
http://www.youtube.com/watch?v=s38vQxXv0GE
I don't mind if I buy the chip and it doesn't work I am more intent on gaining the experience and going through the stages. Do you think this is a good idea and do you have any tips or things I can research on the topic?
Yiannos
---------- Post added at 07:30 AM ---------- Previous post was at 07:14 AM ----------
Sorry I meant this video:
http://www.youtube.com/watch?v=ds04BTVL8i0&feature=youtu.be
yiannos50 said:
Hi Ryan,
My son's galaxy s3 i9300 was inadvertently given a spin in the washing machine...
Click to expand...
Click to collapse
Hi,
If the imei is available (null), it could be the case that it needs repairing rather than actually chaging the eMMC chip , however you'll need a special tool to do this, which honestly do not know which exactly is as I'm more into hardware repairs rather than software.
Another possible issue could be that the phone can also have corrosion around critical components, ie around the main baseband supply, which is stopping from the baseband switch on, thus no signal or any radio communication from starting up. It would be best to have a microscope and inspect each part of the board for bad components, rather than rushing to the eMMC replacement.
It's very important to read this post very carefully and understand it as it is not easy to be done, but it is very much possible. And find a lot of youtube videos before even trying so you'll be more familiar with the process and different techniques.
Anyways for the most interesting part
Basically the eMMC chip is a 14 by 14 bga, ball grid array chip which is fairly easy to reball comapred to other complex ones, like baseband processor or the main application processor, You'll also be needing a reballing stencil to put the balls on top of the solder pins, and solder paste to paste the solder onto the holes and a hot air gun to melt that solder into balls. (Basically the solder paste will melt between those holes inside the stencil and will form nice silverish balls.
The chip also has got a lot of not connected pads (aka dummy pads) so do not worry when removing the chip as you'll be more then likely to lift pads from the board especially if this your first reball job.
First of all, you'll need to clean the surrounding glue around the chip by using around 200C and with a needle scrape off the glue, be very gentle not to scrape any tracks or board layers.
Then to remove the chip from the board use around 350C (always ramping up the temp), very important to use kapton tape around the surroundings to reduce heat stress. Personally I use the following temperatures: (do not use any nozzle with the heat gun as the chip is large and you need the heat to dispersed all over the chip)
1st min 180C full air
2nd min 280C full air
4th min 350C full air until the surrounding components turn silverish and are easy to lift, at that time get a very sharp needle and gently (very gently) start to pry up with ease the chip from one side, until it is fully lifted.
Then you'll need to clean the board, basically put flux and with a fine tip soldering iron clean the pads gently until all underfilled glue is no more remaining and the pads are nice and shiny and set the board aside.
If you'll buy a new eMMC chip most probably you'll have it reballed from the supplier. If not pre reballed, you ll need to reball it using a reballing stencil and solder paste.
Finally align back the eMMC chip over the board in the correct way, always note where is pin A1 and solder it back by ramping up heat again, same process as removing the chip.
The last process is all based on software, basically you'll have to copy the bootloader from a good working S3 phone to this one, as the new eMMC chip is empty of data, and obviously without the bootloader so the phone wouldn't be able to switch on.There is a process somewhere on the net how this is exactly done.
Ryan
Ryan,
Thanks a million for setting me on the right path. I'll let you know what happens.
Yiannos
Data recovery - Siemens A31
Hello everyone,
this thread seems to be what I've been looking for. My Siemens A31 got some water from a torrential rain while it was on. When I got to removing the battery, the phone was already off. I dried all accessible parts but I did not have the necessary torx screwdriver, so some water stayed inside. It was Friday evening and I got the screwdriver no earlier than on Monday. There was some corrosion in the phone, of course. It could not be turned on and subsequent cleaning with alcohol and even ultrasound improved only the look of the main board, but not its behavior. The only sign of life was that it seemingly recharged the battery while connected to the charger.
I have asked several repair services and people and I am quite confused whether it is possible to recover the data by soldering the memory chip into another A31, a functioning one of course. Last time, I asked a laptop service and I was told it is impossible, not just because of the difficulty of soldering a BGA chip. They told me it would not work because the phone would get blocked due to IMEI mismatch! This was surprising for me. If it is true, it implies that the IMEI is stored in both the flash memory and some other chip. I was unable to find any evidence for such a claim on the Internet.
Can anyone tell me if the target phone with replaced flash memory will actually work, assuming the memory is functioning? The video referred to by yiannos50 suggests it may really work. Anyone else has tried it? Two people in this discussion were about to do so.

Samsung GT-i9100 troubleshooting...

Hi guys!I'm not sure that I'm posting this threat in the right section, but i didn't find any other related to hardware.
I have a little problem with my galaxy s2....it overheats - a lot.After trying all official roms from 2.3.5 to 4.1.2 i know that it's a hardware issue.I gave it to a local service repair centre and they told me that the "power managment chip" has bursted and the damage is beyond rapair,but the phone charges up normally and I am able to use it.....probably they are wrong;
So I have a second galaxy which I can use as a donor, could you tell me where is this "power managment chip" located?Also, is the CPU built into the motherboard or it is just "plugged into" and can be "plugged out" ?Perhaps i should try changing the cpu first and see if the heating stops..........or directly replace the whole motherboard...?
I am attaching a pic of my phone with detailed explanation of my problem; PLS post your opinions!
umex said:
...I gave it to a local service repair centre and they told me that the "power managment chip" has bursted and the damage is beyond rapair,but the phone charges up normally and I am able to use it.....probably they are wrong;
So I have a second galaxy which I can use as a donor, could you tell me where is this "power managment chip" located?Also, is the CPU built into the motherboard or it is just "plugged into" and can be "plugged out" ?Perhaps i should try changing the cpu first and see if the heating stops..........or directly replace the whole motherboard...?
I am attaching a pic of my phone with detailed explanation of my problem; PLS post your opinions!
Click to expand...
Click to collapse
My opinions. Power management chips typically control charging and voltage regulation for other components and the system. The CPU (and I'd suppose most integrated circuits (ICs) on the board seem to be SMD (surface mounted device) type components, they look like BGAs (ball grid arrays). They are flow soldered on the board and the solder joints are located underneath the chips. So, manually resoldering them is .. well ... impossible? The solder bumps are between the chip's underside and board top side You can imagine that for manual re-solder, taking into consideration the scale of the components.
When service shops fix phones, if they need to, I suppose mostly they just replace the whole phone as it is easier. If they indeed do repair, the change whole modules, like mother board as one part. Even then it is difficult to find all the small connectors and loose them and re-insert the new mb.
My take on this would depend on the scale of heating. If you feel like wanting to try a repair, first identify exactly which IC is heating up too much. Then proceed from there. Due to small scale of things, even such analysis is total PITA But you wanted to, I understood.
Finally, I would simply buy a new phone or put up with heating. In latter case, take care when charging and otherwise, never to leave your phone unattended as it may in the worst case catch fire.
tapiov said:
My opinions. Power management chips typically control charging and voltage regulation for other components and the system. The CPU (and I'd suppose most integrated circuits (ICs) on the board seem to be SMD (surface mounted device) type components, they look like BGAs (ball grid arrays). They are flow soldered on the board and the solder joints are located underneath the chips. So, manually resoldering them is .. well ... impossible? The solder bumps are between the chip's underside and board top side You can imagine that for manual re-solder, taking into consideration the scale of the components.
When service shops fix phones, if they need to, I suppose mostly they just replace the whole phone as it is easier. If they indeed do repair, the change whole modules, like mother board as one part. Even then it is difficult to find all the small connectors and loose them and re-insert the new mb.
My take on this would depend on the scale of heating. If you feel like wanting to try a repair, first identify exactly which IC is heating up too much. Then proceed from there. Due to small scale of things, even such analysis is total PITA But you wanted to, I understood.
Finally, I would simply buy a new phone or put up with heating. In latter case, take care when charging and otherwise, never to leave your phone unattended as it may in the worst case catch fire.
Click to expand...
Click to collapse
Right.....so if I replace the whole motheboard with the one from the other device, it should boot up, right?It's exactly the same phone, but with broken screen
umex said:
Right.....so if I replace the whole motheboard with the one from the other device, it should boot up, right?It's exactly the same phone, but with broken screen
Click to expand...
Click to collapse
You can test it, yes, and I suppose there's good possibility that it will boot. But there's bigger possibility that you fail to change it correctly, missing a connector, breaking a fragile part etc. But sure, go ahead and try. Tell us how you managed, possibly take close-up photos of the process so that others can follow it. Or at least make a example how not to do things

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