Touch Screen working but backlight is really dim! HELP!:( - Hardware Hacking General

So, a few days ago i received my xperia arc s housing in the mail from ebay, So the next thing i do is replace the housing and put it back together, Its all working but i notice the back button not working, open the phone up again and mess around a bit while the battery was still in the phone, but then the screen stopped working, and i just put it back together cause i couldn't do anything about it. The touch screen works but it doesn't not display anything, i can start up the phone and unlock the screen and feel the vibrations but the display is really dim, like if i take a flashlight and put it over the screen, i can see everything but when i take the flashlight away i cant see anything, The LEDs near in the home buttons are not working either. What some one did suggest is that the chip that controls the LED's are at fault and damaged. Any other suggestions would be highly appreciated.
Thank You

U must check the flex cable to the display, ( make sure u do disconnect and reconnect it with out battery) ,reinsert batt and then check.
U must check if u have damaged any flex cable or left any scratch marks on any circuit boards etc which may cause any damage to the signal/supply lines.( use a magnifying glass)
U must check for some damaged components like smd resistor,capacitor etc..
If nothing helps, gave it to authorized service center.
Sent from my NexusHD2 using xda premium

showlyshah said:
U must check the flex cable to the display, ( make sure u do disconnect and reconnect it with out battery) ,reinsert batt and then check.
U must check if u have damaged any flex cable or left any scratch marks on any circuit boards etc which may cause any damage to the signal/supply lines.( use a magnifying glass)
U must check for some damaged components like smd resistor,capacitor etc..
If nothing helps, gave it to authorized service center.
Sent from my NexusHD2 using xda premium
Click to expand...
Click to collapse
^^ Its probably the cable, check all your connections, and buy a test light or little multimeter for a few bucks to make sure everything is getting power.

Related

Need help - I twisted the JJ screen 360 degrees

after I did it the screen blinked and died. I checked the device with Pocket Controller and it is still alive and working 100%. I guess that the screen connector is out.
Any ideas how to fix it myself? and thoughts from anyone?
:shock:
RonenB said:
after I did it the screen blinked and died. I checked the device with Pocket Controller and it is still alive and working 100%. I guess that the screen connector is out.
Any ideas how to fix it myself? and thoughts from anyone?
:shock:
Click to expand...
Click to collapse
Hate to say it but your screwed. It's going to be very pricy to get it repaired and unless your a real wizard you shouldn't do it yourself because you might just screw it up more then it already is.
I've had this with a laptop of mine and its faith was going through a pricy repair.
Wow how did you manage to turn it 360 degrees? Were you really pulling on it to get it to turn all the way around? You might try downloading the factory service manual off the FTP site and then taking the screen off to see what you did.
that is the amazing part - it was very easy, very low resistance. I even do not know if it is 360 or just in the wrong way. Anyone else can help?
@RonenB
Theres not really a way to repair your flex assembly, unless you are very good with a SMD soldering iron and can repair the ripped cables under microscope with at least 30x maginification. Theres no way other than this (unless you sent your device to athorized service, which depending on country will set you back 105 - 140 Euro, and of course you get warranty for this)
Also you need to open up the whole device in order to work correctly with the flex. IF the flex is not too damaged and those ripped cables can be put together again!
You can check and see, when you turn the screen, theres 1 small black screw which you can unscrew and lift the whole assembly up, and you should be able to see the extend of the damage.
I've done a few of those flexes untill now, and they are hard repair.
Regards
It aint for sure they are ripped. It can be that it just got jagged out of the connector.
But in any case, pull the battery and dont touch the device before repair.
You could very well shortcut other components if they are ripped, so stop fooling around with it any more
New rotator
From another forum I notice there is now an updated, more robust pivoting mechanisim for the exec. See the picture attached. Any ideas where we can buy this part from?
same
my boss did this in day one lol! i just took it back and got it repaired under warranty! just took like 4-5weeks.
regards
It depends how many times u hv rotated 360 deg..if once then there shouldn't b any problem, but 3-4 times..then yes u r in trouble.
You cannot see on the display this means that the central Pivot cable has twisted inside and this has caused the slight detachment of the other end of the cable on the Mother Board.
If u can open with the Guide posted, then u can untwist it and restore it back..else u will hv to change it.
One cannot solder/repair the cable..
Do replace it fast, else it will hv effect on Camera and Sound as well..

screen just shows lines

anyone know how/where to get an xda mini II repaired? i'm in italy, but i can careless where it has to go. I'm at the point where i would rather just sell the device for it's workable parts (if there are any)...Today the screen has done a myraid of interesting things...anywhere from blank to thousands of vertical lines....ugh...
ohh yeah...warranty is void....or is time to just move on?
ok...no answers so i thought i would add some images ...anyone seen this before?
Mate i had a similar **** up a while back ...I did a HR and it worked fine..for me it was caused by a Overclocking software [Dnt want to Name it ]
If this dnt work try the Batt out and back in trick
Call ur Local service Center...
mine looks exactly teh same! but it happened after i tried to replace my housing, i screwed up the little gold prongs where the ribbon connector from the lcd plugs in...****! any ideas on how to fix? im the us so service center isnt really an option, and id ont want to send it off.
hi i had the same problem with my magicians, after i changed the housing. i found the problem with my device was that i had not plugged the screen back in properly. all i did was to ensure that it was pushed in properly before i clipped it back in
Menappi -
I had the exact same issue. I reopened the casing WITHOUT disconnecting any cables. I flipped the screen's ribbon black lock up, while maintaining pressure on the ribbon so that it does not pop out. When the black lock lifted, the preasure of my finger moved the ribbon further in . I pushed the black lock down, reassembled the device and ... PRESTO!! the screen works perfectly... and chumps on the bard advised to buy a new screen!!
Good luck
Hi All,
seems, you have problem somewhere in display connector. However, sometimes I see similar picture on physically broken displays, let's imagine, you were careful ad didn't use a hammer during housing replacement.
There are two possibilities: at first - try to remove and re-insert display cable (I hope, you know. how brown lock works). If there is no success - try again. At second - some wire on flat cable may be damaged. Sometimes, good technician with soldering iron can fix it, sometimes not. And if you used force, removing cable, board connector may be damaged too. However, only the experienced man can find it easily.
So, try to carefuly re-insert display cable. Try several times. If you are unsuccessful, you, for sure, need an experienced technician to fix your device.
I hope, you are not enough mad to send device for repair to Russia

Screen Issue

resently my phone happened to be found in a little container filled with beer loong story on how it happened but it did,,,,
after taking phone appart, cleaning, reassembling.... it works
with exseption of screen we get a lil problem here:
- screen doesnt turn on at all
- if tap phone on one side the screen flickers white or shows the today screen (dialer or program folder if it is open ) for a split moment
i think i need to replace the LCD Screen... or can it be something else?
my question is where can i buy one?
thanks
PS: the only other option is saving for xperia
most likely
It is probably the flex cable that runs from the mother board to the lcd, fairly easy to replace.
you can get them off of eBay cheap.
you might want to take it apart again first and re-clean with a tooth brush and some alcohol (rubbing not beer), be sure and disconnect the flex from the lcd and be sure to allow all parts to dry before reassembling.

X1 Ribbon cable - what happens and a fix I came up with!

Hi, I come on here quite a lot for information as it's an amazing resource! This time however, I'm attempting to give something back!
I experienced the "black screen on slide out" on Monday. Phone completely screwed. I've also had a few droppages and had it apart once before so there's no way warranty is gonna help!
I stripped it down and soon discovered what it is that actually fails on the ribbon. The coating had worn through due to rubbing on something during the slide out / in process. it had been playing up for a while, probably due to shorting out on the metal case, but now the tracks (aluminium?) had worn right down.....
In pic 1 i've circled the worn area. The shiny section is where i'd tried taping over it to prevent shorting, before i realised the tracks were gone.
Got an almost new one off ebay for 15 quid and, realising it was going to happen again, came up with a solution that, so far, looks like it will work....
A while back I bought some "anti rattle felt" for my car's dashboard - really thin and strong self adhesive felt to prevent squeaking joins between dash sections. I cut a piece of this and stuck it to the new ribbon. Once this stuff is on it's well stuck, by the way!
See pic 2 for the modded ribbon cable.
On reassembly everything is working just fine so far! Here's hoping that it lasts longer than 6 months this time!
Just need a new casing now as mine is decidedly second hand!
Hope this turns out to be of use to someone!
cool story bro
when i took apart my xperia to replace the housing this seemed like a really weak point in the device. glad to see someone who has had the problem has been able to fix it
Why does the screen go black?
Hi,
When the coating wears off the ribbon cable it exposes the tracks in it. when you slide the keyboard out the exposed tracks short out on the metal casing and the screen loses it's input signal.
thats whats happened on mine at least and i presume quite a few others?
HTH!
Update:
That's interesting: My phone was also losing signal with the keyboard out, and occasionally while closed up as well. It would just randomly drop to "no signal" for a few seconds.
It hasn't done it since replacing the ribbon cable.....could be coincidental of course.
I'm having the same problem
It just started a week ago and I got the phone in January off of ebay. I'm new to opening up the phone so could anyone help me find the correct tools or have a link to a site with pictured instructions?
I noticed that the sliding mechanism started to go loose about 4-5 months ago but didn't expect the screen not respond in landscape mode. I have yet to see the other symptoms you all are referring to. I would like to fix this before it get worse.
In mine case it went totaly black after one week of this problem... You have all the instruction on youtube, there is where i looked. For tools you can be inovative, but the exactly right ones come with housings from ebay, it is only 15EUR, and i bet you have some cracks so it wouldn't hurt replacing. That is what i did, along with ordering new sliding mechanizm, and new ribbon cable.
I am open for ideas to prevent my ribbon cable from being cut at it weakest point again.
I'm assuming my flex ribbon went bad yesterday, since sliding the keypad out causes my screen to shut off.
Already ordered a cable off ebay and will attempt to replace it myself :O
Replaced my flex ribbon cable with one I bought on eBay. The screen doesn't turn on at all now, which leads me to believe the cable I was sent is defective. Put the old one back in and it works okay, less landscape mode. ughhh what a pain.
great tips! my input is I bought a case off of ebay that was ~60$ and everything actually fit fine for me...so I wouldn't discount every seller but you do get what you pay for, the 15$ cases are probablly the ones that will give you problems
I working in a mobilephone repair center if anyone need help drop me a priv... i able to get 2nd hand or even brand new components
Replaced the flex ribbon cable -
I got my flex ribbon cable a few weeks ago and took it to my local repair shop. They replaced it but the LCD screen/optical joystick receives no power. The touchscreen and everything else on the phone works just fine now. I thought it was a defective item so it was exchanged with a new one.
Got the repair shop to replace it again and the outcome still remains the same as the first.
Theres no light coming from the screen nor the side illumination.
I just told the repair shop to just place the original back in for the mean time.
Before the repairs, there would be a flicker of white light and random illuminations. Now there's no lights at all except the power botton.
Could it be defective a batch that the seller was sending out? or the repair shop's mistake and is playing dumb so they do not have to admint fault?
Hopefully there's an easy fix to this problem.
-Also I did inspect the ribbon before and after the repair. looks new as the OEm
Can anybody help me out with this new problem after replacing the cable -
perhaps you should try a hard reset. Ive had problems in the past where the optical joystick and the illuminators did not work, and that worked for me.
On the other hand, the top illuminators are on the same piece of hardware as the flex cable that was replaced, so a faulty flex cable is possible. The bottom illuminators are on the circuit board that the optical joystick attaches to, separate but connected to the flex cable.
Ive recently replaced my flex cable and touchscreen. The experience i had with the faulty touch screen was that it appeared to receive no power, but was in fact displaying a dark backlit illumination that could only be seen in the dark. At the same time however, the screen did not display anything. I'm not sure if this is similar to your experience, but if so then your touchscreen would need to be replaced.
ive done all repairs on the xperia myself, and one thing ive discovered is if something doesnt work right after a repair, simply disassembling it and reassembling it to make sure all the connections are properly done has worked for me in the past.
"Before the repairs, there would be a flicker of white light and random illuminations. Now there's no lights at all except the power button."
Now when you say the power button, do you mean that a red light appears under it?
I dont know if i can come to a conclusion or that i can help (or have helped) you come to a conclusion, but i can only assure you that the xperia acts out in strange and weird ways.
Good Luck!
Tags
Dismantle / Disassemble Sony Ericson Xperia X1
http://www.ifixit.com/Teardown/Sony-Ericsson-XPERIA-X1/788/1
http://www.formymobile.co.uk/xperiadisassembly.php
http://www.youtube.com/watch?v=AWDurQrRt-Y (REAR)
http://www.youtube.com/watch?v=iyGUbxFqvyc&feature=related (FRONT)
http://www.youtube.com/watch?v=elgC8hwHfYQ&feature=related
For info.
Mike
Thanks for the links. I've tried the hardreset and restoring the original rom but the issue is still there. It's really bugging me that everything works but the LCD screen. I'm currently using MyMobiler to use my phone. The touch screen works fine and so does the soft keys. Just no power for the lights. I might just give up and wait for another phone that catches my eye and then tinker with the xperia myself. but if anyone got a solution or want me to test something then I'll give it a try.
My warranty is no longer affective so I'll use my phone as a tester to help others with any problems.
TRIONDAVE, how's your Xperia running now with the cable mod that you did? Its been 6 months since you created the thread. I hope you're still around.
My Xperia X1 works nearly fine, except for the keyboard issues, so I'm thinking of opening it up. If your Ribbon mod helped I might just do it too once I've got it opened. Mine has a MOUNTain of cracks though, and the battery compartment itself is cracked on both side enough to make the compartment CURVED. Hence the Battery cover doesn't sit well.
I'm looking around for broken Xperias which I might be able to use to change the internal cracked casing. Lets see.
DatDereX1 said:
cool story bro
Click to expand...
Click to collapse
My thoughts exactly.
Hello guys, I am in need of real help over here!
Its just that Ive replaced my ribbon cable, the old one got screwd up.
However I got done for 10 minutes ago, tried to start up the phone.. without success :,(
The ribbon cable doesnt have anything to do with the start up, only the screen am I correct? Cause I cannot even start my phone..
Ive connected the charger, but when I remove the battery it shows a red light, meaning no battery, correct?
So what may the problem be exactly? Maybe the battery is all dead, or?
PLEASE HELP!
for the people with ribbon failures how long have you had the phone before it occurred ? im just interested on the cables lifespan.
mine is fine so far but i have noticed the slider is flimsy and rocks left and right.

Nexus One power button fix

I just bought a replacement power button/ flex cable for Nexus of ebay. Took me around 30 minutes to replace it but its fully working right now. Its around 30 £ .
Item name it "Flex Cable Repair Parts for HTC Google Nexus one G5 1"
Just thought i let you know .
Any pictures?
Is it a tricky fix? I replaced my digitizer just fine so hopefully this wouldn't be a major repair job in comparison. Would love to have my power button working again!
I don't understand why you fixed it yourself, I sent mine back to HTC.
stinkypete said:
I don't understand why you fixed it yourself, I sent mine back to HTC.
Click to expand...
Click to collapse
How much did it cost for the repair out of interest? Did it take them long to get it back to you?
Just curious if to you it looked like a bad button connection or a bad cable? I know sometimes the buttons get crud in them so they dont make a proper connection...
Great info. Too bad we don't have step by step pics. How did you take the phone apart and how deep did you have to go?
Does anyone know why the power button breaks? I have my N1 a year now and (luckily) i never had a HW issue. anyways i was just wondering why it breaks .
Step by step pics would have been nice.
commodoor said:
Does anyone know why the power button breaks? I have my N1 a year now and (luckily) i never had a HW issue. anyways i was just wondering why it breaks .
Step by step pics would have been nice.
Click to expand...
Click to collapse
The power button itself has a small cylindrical piece of plastic which pushes against and presses a small connection that sorta clicks (Which gives you the tactile feedback you feel). I think the problem occurs when either 1) The piece of plastic either bends/breaks/gets damaged in some way that makes that contact much harder to produce 2) The connection is connected to the phone via a cable/flex, however due to the Nexus one design it is bent around in order to be below the power button, while this is fine for the majority some devices, including mine, have seen the flex become damaged for whatever reason and either function intermittently or not at all.
It's also interesting to note that there is nothing holding the flex or the connection in place except for the design itself i.e. the battery bay plastic holds it all in place. My power button was never that responsive (But got progressively worse) so this may explain why.
Its always flex cable breaks and there is no way you can replace just the flex cable.You can find plenty of disassembly instruction over the net and yes you need to disassembly it to the pieces( still less to do than to replace digitizer.)I had a seal broken so i couldn't send it to HTC.
Hollow.Droid said:
The power button itself has a small cylindrical piece of plastic which pushes against and presses a small connection that sorta clicks (Which gives you the tactile feedback you feel). I think the problem occurs when either 1) The piece of plastic either bends/breaks/gets damaged in some way that makes that contact much harder to produce 2) The connection is connected to the phone via a cable/flex, however due to the Nexus one design it is bent around in order to be below the power button, while this is fine for the majority some devices, including mine, have seen the flex become damaged for whatever reason and either function intermittently or not at all.
It's also interesting to note that there is nothing holding the flex or the connection in place except for the design itself i.e. the battery bay plastic holds it all in place. My power button was never that responsive (But got progressively worse) so this may explain why.
Click to expand...
Click to collapse
Thnx for the explanation. I get it now. maybe it smart to always use trackball wake .
Ra1stlin said:
Its always flex cable breaks and there is no way you can replace just the flex cable.You can find plenty of disassembly instruction over the net and yes you need to disassembly it to the pieces( still less to do than to replace digitizer.)I had a seal broken so i couldn't send it to HTC.
Click to expand...
Click to collapse
I did some googling and found a few images of that component, I remember taking it out and it was pretty simple so it should be just fine! Thanks for the info!
Is it the Power button part that you changed ?
Hi,
I have found a photo of the power button part, can you tell us if you changed the full part shown on the photo ?
androidguys.com/2010/09/08/manage-nexus-broken-power-button
And i think you paid it way too much expensive ?
Thanks.
I just replaced my flex cable as well as the loud speaker as well.
iFixit has a few pictures and there is a video on youtube, of the taking apart process. Unfortunately I can't post links
There are two little rubber parts that will likely fall out during the mainboard removal. One goes underneath the connector beside the sim card and one is a part of the microphon.
I wish I could have taken pictures of where those parts go, but alas, my only camera right now is my nexus, so....
BTW, I bought my parts at Mobile Brando. Quite well priced as compared to many other stores of the kind.
was it the whole board that you've replaced? or just the flex cable for the power button. can you further elaborate the steps that you've done?
So this is the item that you purchased? http://mobile.brando.com/google-nexus-one-mother-board-flex-cable-ribbon_p6193c1023d88.html
Can you confirm that the 3.5mm jack is on that board? Additionally, is that motherboard and flex cable for the AMOLED version or the SLCD version?
Do you need to remove the screen and risk getting dust inside there to swap this part?
Hi,
That's exactly the item, at that very same store. I also bought a loudspeaker as well as both back covers there. The audiojack is on board and I believe the flex cable has nothing to do with the screen type. The screen does not have to be removed.
I used those pics: http://www.ifixit.com/Teardown/Nexus-One-Teardown/1654/1
and this video: http://www.youtube.com/watch?v=cznogushN34&feature=player_embedded to figure out how to do it.
Basically, it's quite straight forward, given that you aren't a clumsy oaf ;-)
Remember the two rubber parts that might fall out when you pull off the mainboard assembly. (one at the bottom, for the microphon (http://guide-images.ifixit.net/igi/fpRmPyN6h12mtNvt.huge ,a bit to the left of the plastic tool) and one at the connector beside the sim card (http://guide-images.ifixit.net/igi/EOfeocuwhCRASB6M.huge , on the left part, somewhat down from the serial number sticker).
I have this probleme, but this part costs too much :S....
10. pin ON OFF way in board socket... u make jumper to on off buton
I have replace Power button for my N1. But you can reset your N1 by do'n need it. Except when you want flash rom!

Categories

Resources