JTAG recovery and UART debugging - RAZR HD General

Hi,
So I recently bought RAZR MAXX HD (locked) and while I was fighting with tz kernel I bricked my phone. It's currently in QHSUSB_DLOAD mode (when you connect usb cable) and black screen. So I decided to look for JTAG connector. Anyway, I found one place that looks like jtag connector (maybe it's jtag, maybe it has uart on it). I hope it's similar to Moto X jtag and I'll be able to get uart out of pins 13/15. Will be testing tommorow.
Regards,
Krystian

I tried to warn you, krystian!!! :/
progrockguy said:
Beware of downgrading since you're locked. I remember a few bricking on the Atrix hd.
Click to expand...
Click to collapse
Best wishes on finding UART and JTAG -- hopefully you'll have better luck than Hashcode did. He spent 3 days looking and a few months working on kexec with no success. See here for more info.
Also found this:
mattlgroff said:
MobileTechVideos.com fixed mine us with JTAG repair.
Click to expand...
Click to collapse

progrockguy said:
I tried to warn you, krystian!!! :/
Click to expand...
Click to collapse
I was more than aware of possible risk. But you won't find if you won't search.
Best wishes on finding UART and JTAG -- hopefully you'll have better luck than Hashcode did. He spent 3 days looking and a few months working on kexec with no success. See here for more info.
Click to expand...
Click to collapse
I'm familiar with Hashcode work. I was talking with epinter about it when I started thinking about unlocking bootloader. I hope it's there and we'll be able to continue work on kexec.
Also found this...
Click to expand...
Click to collapse
Unfortunatelly I live in Europe, so I won't be able to use their service. On the other hand flashing service and shipping costs will be almost the same (or even higher) as used mb or 2/3 of riff box costs. But it's good to know someone did it, that gives me clear message that it's possible.

Wires are connected.

OK.
But where are you going to find the proprietary restore files? Did you find?

So cool that you already found the ports. I wish you could find JTAG fix for hardbricked mb860,too.
XT1033 cihazımdan Tapatalk kullanılarak gönderildi

Very interesting thread. Maybe you can even find a way to unlock it the "hard" way

xknobi said:
Very interesting thread. Maybe you can even find a way to unlock it the "hard" way
Click to expand...
Click to collapse
Would be nice but first I'd like to just bring it back to life
Semseddin said:
So cool that you already found the ports. I wish you could find JTAG fix for hardbricked mb860,too.
XT1033 cihazımdan Tapatalk kullanılarak gönderildi
Click to expand...
Click to collapse
I think I found it, but more important is if I'm gonna find correct pin functions... If I buy riff box I could try with Atrix 4G.
aviwdoowks said:
OK.
But where are you going to find the proprietary restore files? Did you find?
Click to expand...
Click to collapse
Don't have them. I will try to use memory dump or just flash mmcblk5 and 7. I'm not sure what can be done with that SoC via jtag.

here are voltages read from the pins (with usb cable connected)
Code:
9 10 11 12 13 14 15 16
1770-1440 50 50 40 60 1620 1810 GND
1 2 3 4 5 6 7 8
1630 1230 2 1800 12 1620 1620 680
with only battery most of those below 100mV are 0mV.
I'm assuming that pin 1 is at the bottom-left because of the text orientation on the motherboard.

Hi mates, there is any way to use QPST to flash the bootloader extracted of a zip?
Greetings!!

http://www.eeboard.com/bbs/thread-27924-1-1.html

Related

[!IMPORTANT!]Full Flash Image Dump from Riff Box or Any Jtag

Hi
I find Full Flash Image Dump from Riff Box or Any Jtag.
Anyone have, maybe this file?? or dump in Jtag?
This is very important for me, and develop. for Tsunagi Toshiba TG01.
This model phone, have a the same structure image system WP7.
Thanks
Nokser
res........
I could help
Nokser said:
res........
Click to expand...
Click to collapse
Nosker, thx for your insists on the device! We really appreciate that!
I have four DVPs here, one bricked, others are normal. I could help but I don't have Riffbox,
If you're sure that riffbox can work on DVP, I can buy one. Because I have worked on the bricked DVP
for some time, and already found JTAG pins on board, even read device ID out by a cable and program
that are made by myself!
So I think I have conditions to help, will you please give me more information about your work?
dawia said:
Nosker, thx for your insists on the device! We really appreciate that!
I have four DVPs here, one bricked, others are normal. I could help but I don't have Riffbox,
If you're sure that riffbox can work on DVP, I can buy one. Because I have worked on the bricked DVP
for some time, and already found JTAG pins on board, even read device ID out by a cable and program
that are made by myself!
So I think I have conditions to help, will you please give me more information about your work?
Click to expand...
Click to collapse
First..
We need to find, how to PIN's Dell vis J-Tag, then create full dump from this device
Nokser said:
First..
We need to find, how to PIN's Dell vis J-Tag, then create full dump from this device
Click to expand...
Click to collapse
Actually I already get JTAG PIN definition on board of DVP, and successfully get ID information from JTAG port, I can send you
pic of definition if you want.
I saw that mofotech send you a DVP, did you get it? if you get both DVP and riffbox, I think it is time to dive in JTAG. right?
Yes, and please send this pic
Nokser said:
Yes, and please send this pic
Click to expand...
Click to collapse
Here it is:
dawia said:
Here it is:
Click to expand...
Click to collapse
Now We need only full dump from working device
You can??
Nokser said:
Now We need only full dump from working device
You can??
Click to expand...
Click to collapse
You got both DVP and riffbox in hand, right? Then let's make things clear:
1. Is the DVP mofotech send you working or not?
2. If it is working, you can get working full dump by yourself;
3. If it is not, please make sure that:
a. riffbox can connect to DVP and get ID info etc.
b. riffbox can read flash memory of DVP.
If you verified a&b, I'd like to buy a riffbox to get a working full dump.
Thx!
dawia said:
You got both DVP and riffbox in hand, right? Then let's make things clear:
1. Is the DVP mofotech send you working or not?
2. If it is working, you can get working full dump by yourself;
3. If it is not, please make sure that:
a. riffbox can connect to DVP and get ID info etc.
b. riffbox can read flash memory of DVP.
If you verified a&b, I'd like to buy a riffbox to get a working full dump.
Thx!
Click to expand...
Click to collapse
I do not have time read J-tag (PIN's)connect via DVP... in this moment
Nokser said:
I do not have time read J-tag (PIN's)connect via DVP... in this moment
Click to expand...
Click to collapse
So please take your time to do some basic test, we can wait until you have time.
If riffbox doesn't work at all, any further work will be in vain, do you agree with me?
Nokser said:
I do not have time read J-tag (PIN's)connect via DVP... in this moment
Click to expand...
Click to collapse
Lollll, take your time. I can also try riff box route guys but I gotta buy a riff box first. Also does this require soldering the riffbox to the board of the dvp? Hmmm I am not that good at soldering!
mofotech said:
Lollll, take your time. I can also try riff box route guys but I gotta buy a riff box first. Also does this require soldering the riffbox to the board of the dvp? Hmmm I am not that good at soldering!
Click to expand...
Click to collapse
No soldering needed, just use a probe with clamp, I've made one myself. I can post a pic of it later for you guys reference...
dawia said:
No soldering needed, just use a probe with clamp, I've made one myself. I can post a pic of it later for you guys reference...
Click to expand...
Click to collapse
Yes... RiFF Box support QSD8X50, etc
Nokser said:
Yes... RiFF Box support QSD8X50, etc
Click to expand...
Click to collapse
That's really good news. May we get from you the screen shot of JTAGManager program when connecting DVP?
Just want to get more detailed information, thx!
ok.. but i need user, who have too Riff Box...
Nokser said:
ok.. but i need user, who have too Riff Box...
Click to expand...
Click to collapse
I'd like to volunteer, but maybe 5 days later, a Riff Box is on it's way to my place.
dawia said:
I'd like to volunteer, but maybe 5 days later, a Riff Box is on it's way to my place.
Click to expand...
Click to collapse
Great!
dawia said:
I'd like to volunteer, but maybe 5 days later, a Riff Box is on it's way to my place.
Click to expand...
Click to collapse
Awesome! Let me know if I can do anything.
One possible non-soldering way of connecting
Guys, here's my JTAG connecting, ugly but useful, hope it helpful...

QHSUSB_DLOAD Problem

Hej Guys,
I normally used my Nexus 4 - then it´s shut down(used hells-core + slimbean).
Now nothing will work(no normal booting, no fastboot and no charging etc) - only when I try to connect it with my PC the N4 wants to install drivers(QHSUSB_DLOAD anything).
Any ideas from your side, how to solve the problem?
BR,
Rash
Rashiel said:
Hej Guys,
I normally used my Nexus 4 - then it´s shut down(used hells-core + slimbean).
Now nothing will work(no normal booting, no fastboot and no charging etc) - only when I try to connect it with my PC the N4 wants to install drivers(QHSUSB_DLOAD anything).
Any ideas from your side, how to solve the problem?
BR,
Rash
Click to expand...
Click to collapse
whats hells-core?
Rashiel said:
Hej Guys,
I normally used my Nexus 4 - then it´s shut down(used hells-core + slimbean).
Now nothing will work(no normal booting, no fastboot and no charging etc) - only when I try to connect it with my PC the N4 wants to install drivers(QHSUSB_DLOAD anything).
Any ideas from your side, how to solve the problem?
BR,
Rash
Click to expand...
Click to collapse
Your phone is screwed. Send it to get repaired
Sent from my Nexus 4 using xda app-developers app
@simms22 -> A core from a german dev(Hellsgod - I think he is here on xda too).
@urmothersluvr -> Mhm, seems so No possibility to fix it myself?
Btw. I rooted my phone(as Custom-Kernel/Custom-Rom says).. May any problems with warranty? Not really(because phone don´t starts, right)?
BR,
Rash
Rashiel said:
@simms22 -> A core from a german dev(Hellsgod - I think he is here on xda too).
@urmothersluvr -> Mhm, seems so No possibility to fix it myself?
Btw. I rooted my phone(as Custom-Kernel/Custom-Rom says).. May any problems with warranty? Not really(because phone don´t starts, right)?
BR,
Rash
Click to expand...
Click to collapse
I know when I had a sensation if your phone got in that mode it ment u bricked it. They can't tell what is on your phone cause that mode is used to flash firmware by manufacturers. Send it in and they will reflash it for you and send it back. Dont tell them u rooted it or unlocked it or flashed a ROM/kernel.
Sent from my Nexus 4 using xda app-developers app
Uhm - not really good...
Because I don´t do anything "hard" things with the Nexus - only played a little game..
I won´t tell anything to Media-Markt...^^
Hope this will be done fast
Thanks for help!
Your device is bricked. Only way will be to send it back to have the motherboard replaced.
zelendel said:
Your device is bricked. Only way will be to send it back to have the motherboard replaced.
Click to expand...
Click to collapse
Thanks - as I wrote above, there should no problems with warranty or?
I mean, how should they see, if there was a Custom-Kernel/Custom-Rom on the Nexus?
Rashiel said:
Thanks - as I wrote above, there should no problems with warranty or?
I mean, how should they see, if there was a Custom-Kernel/Custom-Rom on the Nexus?
Click to expand...
Click to collapse
It depends on if they can bring the board back. If they can then they will see that and may charge you for the repair but the chances are slim.
zelendel said:
It depends on if they can bring the board back. If they can then they will see that and may charge you for the repair but the chances are slim.
Click to expand...
Click to collapse
Okay - so my chances are 50/50
That´s really bad - any ideas of how much they would invoice me, if they see it?
Rashiel said:
Okay - so my chances are 50/50
That´s really bad - any ideas of how much they would invoice me, if they see it?
Click to expand...
Click to collapse
I would say more like 95/5 That they wont see it. It is really hard to bring the board back. If they do it depends on them. Could be cheaper to get new device but wouldnt count on them seeing it.
zelendel said:
I would say more like 95/5 That they wont see it. It is really hard to bring the board back. If they do it depends on them. Could be cheaper to get new device but wouldnt count on them seeing it.
Click to expand...
Click to collapse
If they won´t find it and make a new board in it - i´ll never flash or root a Smartphone again
And I thought, Nexus is unbrickable
Rashiel said:
If they won´t find it and make a new board in it - i´ll never flash or root a Smartphone again
And I thought, Nexus is unbrickable
Click to expand...
Click to collapse
No device is unbrickable. All you have to do is make sure you understand what your doing before you do it. Spend a week or so researching what you are doing then and understand what you are doing first.
zelendel said:
No device is unbrickable. All you have to do is make sure you understand what your doing before you do it. Spend a week or so researching what you are doing then and understand what you are doing first.
Click to expand...
Click to collapse
Flashed rooted SGSII / Galaxy Nexus..
I have a bit experience..
But I don´t exactly know what happened to N4...
Rashiel said:
Flashed rooted SGSII / Galaxy Nexus..
I have a bit experience..
But I don´t exactly know what happened to N4...
Click to expand...
Click to collapse
That is exactly what happened. There is no SGSII rom that will work on the Nexus. Only Nexus roms will work on the Nexus.
zelendel said:
That is exactly what happened. There is no SGSII rom that will work on the Nexus. Only Nexus roms will work on the Nexus.
Click to expand...
Click to collapse
I think we missunderstood..
I had an S2 and flashed Roms for that..
I had a Nexus and flashed Roms for that..
And now for Nexus 4 - and I flashed the correct ones..
Rashiel said:
I think we missunderstood..
I had an S2 and flashed Roms for that..
I had a Nexus and flashed Roms for that..
And now for Nexus 4 - and I flashed the correct ones..
Click to expand...
Click to collapse
Yeah I misunderstood your post. So lets see if we can figure out what happened. What was the last thing you did before it happened?
zelendel said:
Yeah I misunderstood your post. So lets see if we can figure out what happened. What was the last thing you did before it happened?
Click to expand...
Click to collapse
Downloaded PA - played a bit.
Rashiel said:
Downloaded PA - played a bit.
Click to expand...
Click to collapse
It sounds like you flashed a ROM/kernel for another device. Can you post the file you flashed?
Sent from my Nexus 7 using Tapatalk HD
Hej..
Now more Information..
Loaded PA for Mako..
Played Pocket Legends..
Not more..
And while im playing my power goes to zero, so it booted down..
Now after i did nothing with it and loaded 2 minutes..
I could boot and my Nexus is repaired
Thanks for your help guys!
Gesendet von meinem Nexus 4 mit Tapatalk 2

[Q] Hard bricked my XT907, any way to JTAG?

Alright, I'm an idiot and should leave the hacking to the hackers. I've managed to hard-brick my RAZR M. It acts like it has no battery.
I thought hmmm... if the bootloader unlock exploit targeted the TZ (TrustZone) partition and the OTA patched out the TZ exploit, maybe I can downgrade the TZ partition to bring it back! So like the idiot that I am, I "dd" the old tz.mbn into /dev/block/mmcblk0p7. Attempted to reboot to see what would happen, and well, brick happened. So yeah, don't do that.
Anyway, is there a way to JTAG it back, or is my only recourse to use it as parts to fix a phone with a cracked screen or something?
Also, I'm not smart enough to know why it won't boot with a downgraded TZ partition. Is a hard-brick what happens when the "chain of trust" is broken? Could it have worked had I downgraded every single partition involved in the chain of trust, or am I super far off base?
What exactly do you mean when you say it acts like it has no battery?
Try hooking it up to the computer and quickly press all 3 buttons to get to the boot menu. If you can, go into AP Fastboot and RSD a stock image back to stock everything.
Sent from my Nexus 7 using xda app-developers app
It pretty much acts exactly like a phone from which the battery has been removed. Dead as a doornail.
No power, no lights, holding buttons does nothing, plugging it into USB does nothing, holding buttons while plugging into USB does nothing. Can't get into AP Fastboot, nor do any USB devices ever show up to run RSD. Zero signs of life whatsoever.
Either make or buy a factory cable/adaptor .... Its.not hard to make or team black hat has them for $10usd
Sent from my XT907 using xda app-developers app
Just read up on them, I'm not sure if it'll work for me. Team Black Hat's twitter says it just bypasses the phone battery and allows it to be powered from USB. Sounds like it would mostly be useful for phones whose battery died during the flash. I might try it anyway, but my phone had 100% battery when I tried to reboot it.
Use it to flash the stock firmware... It should recognize the battery after that
Sent from my XT907 using xda app-developers app
I tore apart a mini-to-micro adapter and wired up pin 4 to pin 1 as this tutorial shows.
http://www.droidforums.net/forum/droid-labs/146492-how-why-make-your-own-motorola-factory-cable.html
Verified +5V on both pin 1 and 4.
Nothing.
I think to get into AP Fastboot or even for the bootloader to launch, it probably requires an unbroken chain of trust and my downgraded TZ partition breaks the chain so it doesn't even try to start the bootloader. Just guessing though.
I've been searching around... Can't really find much to assist with this... You may be able to get some help from the higher up's if you message them...
Sent from my XT907 using xda app-developers app
Thanks for searching. I'll probably end up looking for a phone with a smashed screen on ebay and swap the motherboard. Maybe I could get lucky and find one that's never been updated, though I doubt that.
Can't help but wonder if I'd flashed every single partition involved in the chain of trust if that would have worked to downgrade. Dangerous thinking. I'd best stop thinking about it or I'll end up with another bricked phone.
After months of my phone being bricked, I decided to plug it into USB and the green light came on and it shows signs of life. No picture on the display, but it shows up as USB Input Device, shows as "HID-compliant" in device manager. Hardware ID is VID_05C6, PID_F006. All I could find is the VID belongs to Qualcomm. Any ideas?
GnatGoSplat said:
After months of my phone being bricked, I decided to plug it into USB and the green light came on and it shows signs of life. No picture on the display, but it shows up as USB Input Device, shows as "HID-compliant" in device manager. Hardware ID is VID_05C6, PID_F006. All I could find is the VID belongs to Qualcomm. Any ideas?
Click to expand...
Click to collapse
Yea there is a fix , just recently too...
GOOGLE or should I say bin* is your friend (yes better not so commercial $$).
aviwdoowks said:
Yea there is a fix , just recently too...
GOOGLE or should I say bin* is your friend (yes better not so commercial $$).
Click to expand...
Click to collapse
Sorry, my Google-fu is not as good as yours. Searching for that VID and PID only comes up with an XDA thread on an HTC Unbricking Project in the Evo 4G LTE section. Google has zero hits linking either VID or PID with "RAZR M". Everything I've read about unbricking requires the phone to be able to get into Fastboot AP.
Tried Bing too, but my Bing-fu is worse than my Google-fu.
GnatGoSplat said:
Sorry, my Google-fu is not as good as yours. Searching for that VID and PID only comes up with an XDA thread on an HTC Unbricking Project in the Evo 4G LTE section. Google has zero hits linking either VID or PID with "RAZR M". Everything I've read about unbricking requires the phone to be able to get into Fastboot AP.
Tried Bing too, but my Bing-fu is worse than my Google-fu.
Click to expand...
Click to collapse
No its yooh eyes!
http://forum.xda-developers.com/showthread.php?t=2149889
aviwdoowks said:
No its yooh eyes!
http://forum.xda-developers.com/showthread.php?t=2149889
Click to expand...
Click to collapse
My problem is similar, but not exactly the same. I don't get "Qualcomm HS-USB QDLoader 9008", just "HID compliant device", but I know it's Qualcomm just from the VID.
At bottom of the thread is just a link to a JTAG unbricking service for $50. Is that the solution you're referring to?
If that's the only solution, I'll try a motherboard swap first. It's half the price.
GnatGoSplat said:
My problem is similar, but not exactly the same. I don't get "Qualcomm HS-USB QDLoader 9008", just "HID compliant device", but I know it's Qualcomm just from the VID.
At bottom of the thread is just a link to a JTAG unbricking service for $50. Is that the solution you're referring to?
If that's the only solution, I'll try a motherboard swap first. It's half the price.
Click to expand...
Click to collapse
I thought that was the same....
Not up on the subject. I know cellzealot is, on that thread.
The problem is that we don't have the signed images for the low level boot ram downloader for these models available to us.
I helped someone fix their hard bricked Moto X but we were only able to do that because the boot loader repair kits for that chip set were included in some of the leaked engineering firmware builds for those devices. Those kits have the bin and hex files and a .bat script that writes the images to the raw QC flash device that allows it to be enumerated as an Android fastboot device and flashed normally with signed firmware images.
Unless we get those repair kits or find all of those components in the wild, we can't recover these phones from a hard brick.
FIXED! But not in a "good way" that's helpful for the community.
I bought one with a cracked screen on eBay and swapped my screen onto it. The screens are still quite expensive for these phones (~$90) so cracked screen versions go pretty cheap. Paid $26 shipped for mine which is on the high-end, most went for ~$20 shipped but I'd miss the auctions for one reason or another. This one also was in nicer shape than mine which was worth the extra $6 to me. Although I later came to find out it takes a good deal of heat and force to get the screen out of the metal bezel since the rubber glue adhesive Motorola uses is DAMN STRONG, not like the 2-sided tape from my iPhone fixing days. Didn't want to risk cracking my good screen trying to swap it into the nicer bezel so I just swapped the entire screen/bezel assembly. Super easy.
Worst part, 98.18.78. BOOOOOOOOOOOO!!!
Oh well, nothing gained, and only $26 lost.
Any reason at all to keep it on 78 and not upgrade to 94?
just curious if anyone has played with qpst while in qhusb (?) mode i know the qpst software has the ability to flash to devices in this form of download mode if someone were able to recover a device with it then the next thing on my mind would be can we downgrade with it to a version that could be bootloader unlocked. i'd try it myself but its very risky to try on a device thats perfectly good. but perhaps... one with a broke screen or otherwise scrap would be perfect to mess around with
QPST didn't seem to notice the existence of my phone when it shows up as a "Qualcomm USB Input Device".
Part of it could be it won't stay on for very long, not even using the USB cable I bought that's supposed to be a Motorola factory cable.
GnatGoSplat said:
QPST didn't seem to notice the existence of my phone when it shows up as a "Qualcomm USB Input Device".
Part of it could be it won't stay on for very long, not even using the USB cable I bought that's supposed to be a Motorola factory cable.
Click to expand...
Click to collapse
Need the virtual serial port in that link!

Charging became very slow

My device charges super slowly (I used it about 2 years)
I tried many ways to fix but nothing happen.
Is there any chance that my battery is so damage
Please confirm that and is there any way to fix it (except replacement)
Thank you
Need more Info:
When did this start?
How much time does it take to charge?
Which ROM and kernel are you on?
Do you have a rooted device?
Try seeing the battery icon while you change the position of your tablet. It may be due to a bad USB Port.
And, What things have you tried?
Press Thanks If I Helped You!
Sent from my dead Nexus 7 2013 LTE! ???
Thank you for fast reply.
It happened about 1 month ago and it take 7 hours to charge from 20% to 70%. i did not up any ROM, just updated android automatically. Of course i always check the battery icon when charging and i also tried another adapter AND another USB port, too. I try to turn off while charging and clear cached.
Any suggestion else
Thanks aniket0317.
thttht said:
My device charges super slowly (I used it about 2 years)
I tried many ways to fix but nothing happen.
Is there any chance that my battery is so damage
Please confirm that and is there any way to fix it (except replacement)
Thank you
Click to expand...
Click to collapse
I think you're on the wrong forum, if your device is 2 years old it should be a first gen Nexus 7.
Maybe if you post your problem there it should get more answers.
alresave said:
I think you're on the wrong forum, if your device is 2 years old it should be a first gen Nexus 7.
Maybe if you post your problem there it should get more answers.
Click to expand...
Click to collapse
Sorry but i cannot find any place to post this, and i think that 2013 and 2012 is also the same. I need to confirm that maybe my battery is wrong. Thanks
Did you try a factory reset?
If that didn't work, try unlocking it and using the Flash Stock + Unroot option in Wug's Nexus Toolkit.
Press Thanks If I Helped You!
Sent from my dead Nexus 7 2013 LTE! ???
thttht said:
Sorry but i cannot find any place to post this, and i think that 2013 and 2012 is also the same. I need to confirm that maybe my battery is wrong. Thanks
Click to expand...
Click to collapse
No, 2012 version and 2013 version are not the same! But I give you a tip: maybe the charging port (micro USB) is dirty, or broken. Charger is broken. I don't have a Nexus 7 2012 so I don't know the hardware and can't help you.
Gesendet von meinem Nexus 7 mit Tapatalk
Did you try another cable? Asking cause I don't see it mentioned. Unless trying another charger implied the cable too.
aniket0317 said:
Did you try a factory reset?
If that didn't work, try unlocking it and using the Flash Stock + Unroot option in Wug's Nexus Toolkit.
Click to expand...
Click to collapse
I already did and i do not think i should unlock it. Thanks for you help
KJ said:
Did you try another cable? Asking cause I don't see it mentioned. Unless trying another charger implied the cable too.
Click to expand...
Click to collapse
ChiDi9901 said:
No, 2012 version and 2013 version are not the same! But I give you a tip: maybe the charging port (micro USB) is dirty, or broken. Charger is broken. I don't have a Nexus 7 2012 so I don't know the hardware and can't help you.
Click to expand...
Click to collapse
Thanks for all helpings. I changed the charger and the usb cable also but nothing happen (i mentioned that). So maybe the thing is battery.
This happened to my 2012 Nexus 7, I had to replace the charging port.
You can get them on eBay for about $20 and if you can use a screw driver, you can change the port out in about 20 minutes.
Sent from my Nexus 7 using XDA Free mobile app
I had this problem too after not using it for about a month. Replaced the charging port and problem solved! One of the easiest fixes to do

[Help] Replace USB port on N910C

Heya,
It seems like my usb connector is busted (or the entire daughterboard. i'm not sure) but I'm wondering if anyone has had experience replacing just the connector?
The phone still charges via usb, but when i plug it in, it says that the USB device has malfunctioned and it won't connect to the computer. I don't know if this is a daughterboard failure or just a port failure.
i'm hoping to find a way to replace the part without having to remove the screen if it is even remotely possible..
any advice?
Thanks
It looks like you need to remove the screen to replace the USB port. The part is probably quite inexpensive and unless your soldering is extremely good then I'd just replace the whole thing. I did it in my Note 3, that was easy, but never done it on my Note 4.
https://www.ifixit.com/Guide/Samsung+Galaxy+Note+4+Micro-USB+Port+Daughterboard+Replacement/35006
yeah, my biggest worry is that if i have it done by someone, they would crack the screen and a $65 repair will turn into a $300 repair....
Device modified in any way? Knox tripped?.....If not then (in the EU at least) Samsung provides a 2 year warranty......
It *could* be argued that the usb port should be expected to last for the full 2 years at least......
Check your paperwork/warranty card and try for warranty repair.
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
Device modified in any way? Knox tripped?.....If not then (in the EU at least) Samsung provides a 2 year warranty......
It *could* be argued that the usb port should be expected to last for the full 2 years at least......
Check your paperwork/warranty card and try for warranty repair.
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
yup. rooted and knox tripped
i have the international version, so i doubt samsung will even bother to work on it since i'm in the US atm
mputtr said:
Heya,
It seems like my usb connector is busted (or the entire daughterboard. i'm not sure) but I'm wondering if anyone has had experience replacing just the connector?
The phone still charges via usb, but when i plug it in, it says that the USB device has malfunctioned and it won't connect to the computer. I don't know if this is a daughterboard failure or just a port failure.
i'm hoping to find a way to replace the part without having to remove the screen if it is even remotely possible..
any advice?
Thanks
Click to expand...
Click to collapse
have you try connecting it to another computer?
my 910H is acting like that too when connected with my home PC.
but if connected with office PC, no problem appears. It mounted well on windows explorer.
driver issue, perhaps.
cacingbesar said:
have you try connecting it to another computer?
my 910H is acting like that too when connected with my home PC.
but if connected with office PC, no problem appears. It mounted well on windows explorer.
driver issue, perhaps.
Click to expand...
Click to collapse
I wish that was the case.
I tried it on 3 different PCs. no dice. all the same messages.
mputtr said:
I wish that was the case.
I tried it on 3 different PCs. no dice. all the same messages.
Click to expand...
Click to collapse
I know this is a silly question, but have you tried installing drivers before connecting?
cacingbesar said:
I know this is a silly question, but have you tried installing drivers before connecting?
Click to expand...
Click to collapse
yup. uninstalled the driver completely on 2 of the computers and reconnected. the moment i insert it, it says usb device has malfunctioned. it'll charge, it just will not establish a connection
mputtr said:
yup. uninstalled the driver completely on 2 of the computers and reconnected. the moment i insert it, it says usb device has malfunctioned. it'll charge, it just will not establish a connection
Click to expand...
Click to collapse
All I can say now is : good luck, bro.....
Sent from my SM-N920C using XDA-Developers mobile app
lol i know. I'm still trying to figure out if I should do my own repair... or pay 50ish bucks to get it done by someone else...
mputtr said:
lol i know. I'm still trying to figure out if I should do my own repair... or pay 50ish bucks to get it done by someone else...
Click to expand...
Click to collapse
So did you get it repaired already? I have exactly same problem on my N910C. Tried different cables, different pc, factory reset, reinstall driver and other possible fixes that I can find on the net but still can't get it recognized on pc. I sent the phone to some repair shop to replace the usb board but the outcome is still the same.
I've bought the phone as a used unit and straightaway updated it OTA to Marshmallow. It is possible that I got a bad firmware?
kentangz said:
So did you get it repaired already? I have exactly same problem on my N910C. Tried different cables, different pc, factory reset, reinstall driver and other possible fixes that I can find on the net but still can't get it recognized on pc. I sent the phone to some repair shop to replace the usb board but the outcome is still the same.
I've bought the phone as a used unit and straightaway updated it OTA to Marshmallow. It is possible that I got a bad firmware?
Click to expand...
Click to collapse
unfortunately not yet. I'm still waiting for the part to arrive.
I might pay someone to do it for me, but other than that, i'll have to just try my luck.
I don't know about firmware because my issue cropped up randomly and I've been on this rom for over 3 months. so i think it's more of a port or board failure.
One thing *might* come in to play with the replacement......
On both the S2 and the S5, there were/are several versions of the board for each device.....none of them are interchangeable.
If Samsung follows previous form, this may well be the case for the Note as well.
http://i.imgur.com/rVnFwJM.jpg
yup! indeed that was what was holding me up. I have the N910C and no repair shop in the US has that board, so i have to order it from China....
mputtr said:
yup! indeed that was what was holding me up. I have the N910C and no repair shop in the US has that board, so i have to order it from China....
Click to expand...
Click to collapse
But....If it follows the Samsung pattern, there will be more than one version of that board for the N910C......
Going back as far as my experience with the S2, my device was the international variant, and i discovered that just for that one device, there were 4 different versions of the board.
They were....
REV1.2, REV2.2, REV2.3 and REV2.4....
I had to get the matching version otherwise it led to problems like reduced/loss of signal, otg failure, data transfer failure......The list went on and on....
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
But....If it follows the Samsung pattern, there will be more than one version of that board for the N910C......
Going back as far as my experience with the S2, my device was the international variant, and i discovered that just for that one device, there were 4 different versions of the board.
They were....
REV1.2, REV2.2, REV2.3 and REV2.4....
I had to get the matching version otherwise it led to problems like reduced/loss of signal, otg failure, data transfer failure......The list went on and on....
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
oh if you're talking that specific, then no there's no problems that I know of about specific revisions.
If there was it would be all over ebay with different revisions of the boards.
Sent from my SM-N910C using XDA Free mobile app
mputtr said:
oh if you're talking that specific, then no there's no problems that I know of about specific revisions.
If there was it would be all over ebay with different revisions of the boards.
Sent from my SM-N910C using XDA Free mobile app
Click to expand...
Click to collapse
Um....done a little ebay research and for the F variant, I've seen 4 different revisions (so far)........
0.6, 0.8, 0.9 & 1.8
I think getting the right one is gonna be critical if, as I said before, it's the same 'pattern' as with previous devices.....
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
Um....done a little ebay research and for the F variant, I've seen 4 different revisions (so far)........
0.6, 0.8, 0.9 & 1.8
I think getting the right one is gonna be critical if, as I said before, it's the same 'pattern' as with previous devices.....
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
I looked up the N910C variant and there's no revision.
and looking up the F variant.. I don't see any revisions as you said either: http://www.ebay.com/sch/i.html?_odk...+usb+board.TRS0&_nkw=n910f+usb+board&_sacat=0
I went into a random selection of listings and zoomed in on the images.....
The printing on the black ribbon cable is where I saw the revision information....
http://i.imgur.com/rVnFwJM.jpg

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