Develop Bugs

.:: HELP Appreciated ::. Universal - WHITE SCREEN Problem...

.:: HELP Appreciated ::.
Hello Tech GURUS,
I returned from a long tour (I kept my XDA EXEC at home) & found that my XDA EXEC has got a problem of WHITE SCREEN!! Nothing is Displayed!!
May be brother's childrens or anyone of my friend accidentally did it in my absence(Sorry I'm NOT Sure). May be they pivoted (Turned) the screen in a WRONG DIRECTION!
That doesn't matter WHO DID IT, But the problem screwed my head & I started to trace the problem.
Symptoms:
1) Only WHITE SCREEN(with LCD Backlight), Nothing Else.
2) Charges perfectly through USB & also from Charger.
3) When I connects it to ACTIVE SYNC, it Syncs fine & I can able to explore the files/folders. Copy from & to the handset memory is also works fine.
4) Tried to enter into BOOTLOADER Mode(by pressing Light+Power+Reset), there also got a BLANK SCREEN (NO LCD Backlight).
5) TOUCH SCREEN detects TAPs & make sounds (Tick Tick), That indicates Touch Screen Working fine.
6) Qwerty KeyBoard Works fine. I don't know at what extent, since I can't see nothing on screen. But when I press a key on QWERTY Kbrd, it sounds Tick.
7) Transfered(Beamed) a CONTACT from my another XDA IIi & found Its accepted the beamed data.
8) Volume Up/Down make sounds (Tick, Tick...).
What I Did:
1) Removed the Battery & re-inserted & tried to BOOT it. NO result, just a WHITE SCREEN.
2) Purposely Tried to Rotate the Screen in Wrong Direction to test the loose contacts of co-axial cable.
3) Lastly Dis-Assembled the whole handset (Removed all parts 100%) & Re-Assembled it. But the Problem remains SAME.
4) Dis-Assembled again & this time I tested the LCD Co-Axial Cable's connectivity from MainBoard side connector to LCD Side Connector. There are 2 Cables which connects to LCD. One is 30 Cores Cable & Second one is 40 Cores Cable.
I Successfully tested 30 Cores Cable(Actually it used only 28cores cable, remaining 2 points at connector are DUMMY) & Second 40 Cores Cable I'm UNABLE to Test Since I lost my patience while connecting my Testing Meter to Hair Line sized cores & in just an 10mm connector got 40 cores!!!
5) Observed all cores which passes through SCREEN ROTATOR BASE Hinges & found there is NO physical Damage or CORE CUT.
CAN ANYONE HELP ME TO SOLVE THIS WHITE SCREEN PROBLEM?
IS IT A HARDWARE BASED PROBLEM? OR SOFTWARE BASED?
IS IT A PROBLEM WITH DISPLAY CHIP(IC) ON MAINBOARD?
JUST CONFUSED & SEEKING HELP FROM TECH GURUS.
THANKS IN ADVANCE.
HellCrusher.

Hi hellcrusher,
CAN ANYONE HELP ME TO SOLVE THIS WHITE SCREEN PROBLEM?
IS IT A HARDWARE BASED PROBLEM? OR SOFTWARE BASED?
IS IT A PROBLEM WITH DISPLAY CHIP(IC) ON MAINBOARD?
Click to expand...
Click to collapse
This seems to be a hardware problem. Check connectors in the display housing first. This unit is quite easy to disassemble.
Before you start, you should have a look in the universal SERVICE MANUAL to check out how it gets torn apart .
If all connectors to the display are right in place, but your display still shows nothing ...open the universal body too.
Folow the steps in the manual
Regards,
scholbert

White Screen
Hello, this is my first post. May I first just say how great I think this site is, the guides on here really are useful to beginners.
With regard to the white screen, not sure if this helps, but during dismantling of my various PDAs, I managed to connect an LCD ribbon incorrectly, I kind of forced it in & folded one contact over, resulting in white screen. Disconnected, straightened & refit. Hey presto, works like a charm. Hope this helps.

I had the issue, had to buy a new flat cable
It is rare to actually see the damage to the cable, because the damage is inside the insulation....
Best regards!

On the topic...
Hello!
I have a similar issue with my Orange SPVm5000, except that mine will work for up to a minute after a hard reset before going to a white screen.
If I hard reset pressing the left+right+reset keys, the device shows the boot screen and sometimes ever goies into the initial setup but then all of a sudden it goes white. I've opened up the screen and verified and reconected all connections but still the problem persists. Also I've noticed that its not any action I make that causes it; more like a heat/timing issue. Per advice above, I will check the connections in the body but does anyone have any other ideas?!?
Thanks!
Greg.

I have a similar problem. The story;
I purchased an orange branded M5000 on flebay described as second hand in fantastic condition blaa blaa.
When the phone eventualy turned up it had no manual, the outer sleeve of the box was missing and the wrong usb cable was supplyed (one of those larger usb plugs you usualy get for printers.
I have shedlooads of cables and rely wasn't bothered about any of these problems at the time and went about charging the phone (it was totaly flat)
When fully charged I stuck my sim in and poweded her up the phone works fine in portrate and landscape view but as you rotate the screen so it is inline with the keyboard the screen fades to white about half way.
I contacted the seller who basicly told me the phone is second hand so sold as seen!?!?!?
I have flashed various roms on it to see if it was a software fault but nothing.
I think this phone had been in storage as its battery was totaly flat and incorrect accessories suggest the seller didn't check it before shipping. So I believe there is a problem with this phone that occurs when stored.
Sorry for the long post

Have you flashed any rom or just had this problem ...
my conclusions:
1. If you have flashed a new rom to your universal, try to reflash the original rom, it works for many users.
2. If you havent flashed any rom, maybe its a hardware problem.
2.1 If you just used it in a bad way, (ie: rotate screen in wrong way), dissamble it..
2.2 If you have let it on a heat, weat, etc.. place.. maybe the mainboard got a cut-circuit.
Saludos

I tryed a couple of popular WM6 roms (I forget whitch ones) and returned to the genuine Orange WM5 rom. So I doubt its a software fault.
As far was extreme conditions go the phone was well packaged when posted I will gove that to the seller SO unless the eposure happened before shipping I don't think thats to blame ether.
I think the wire in the swivle joint is failing and will continue to get worse as the joint is exercised.

Try to clear it up..
Hi there,
i made a lot experiments with the uni, so let me try to focus what's wrong:
First LVTato's Orange SPVm5000
...
If I hard reset pressing the left+right+reset keys, the device shows the boot screen and sometimes ever goies into the initial setup but then all of a sudden it goes white. I've opened up the screen and verified and reconected all connections but still the problem persists. Also I've noticed that its not any action I make that causes it; more like a heat/timing issue. Per advice above, I will check the connections in the body but does anyone have any other ideas?!?
Click to expand...
Click to collapse
Sounds like the image could not be loaded completely.
The framebuffer is initialized correctly after cold boot, but afterwords booting into wince fails.
So maybe it's pure software issue (flash content is corupt -> image is broken).
Other possibility: Some region of your flash is damaged (more hardware related).
jahshappybus' Orange SPVm5000:
...
poweded her up the phone works fine in portrate and landscape view but as you rotate the screen so it is inline with the keyboard the screen fades to white about half way.
Click to expand...
Click to collapse
Looks to me like a typical cable issue. Maybe someone twisted the screen the wrong way!
So this is what i guess at least.
Regards,
scholbert

White screen
99 % of these white screen faults is a typical cable issue. And you don't have to twist your screen wrong way to have this problem, also.... just twist it too often First you have to see if the device is working, apart the screen.... call the number of your phone see if it is just screen related problem. Broken display cable will leave your device oprational, you just don't see the image.
I know it is "less painfull" for people to think it is a software problem.... (The "it would not happen to me" syndrome ) but sometimes things just brake, and moving parts are most risky...
The fact you don't see the damage is of no importance due to the size and nature of the damage. Don't expect to see broken wires in the cable. And even if you check the cable by you instrument, somethimes it will show you it's ok, but in some positions it will loose contact.
Try a different cable... that way you'll be sure.
Best regards, and all the luck!

"Looks to me like a typical cable issue. Maybe someone twisted the screen the wrong way!"
I agree and luckily, finally paypal do as well.
It is being boxed up to a red faced seller as we speak.
A happy ending for me (speaking to soon?)

i hav the same problem as u "HELLCRUSHER" and i flashed also but was not able to cure
still hav this white screen ..

Found this link for some where selling the screen cable assmebly.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=300254338133
Hope this is of use.

Touchscreen freeze... ! Help please

Hello guys,
Around a week back, my MT3G slide touch screen got unresponsive for a while. I rebooted around 2-3 times and thankfully the touchscreen worked fine.
Now, I am getting this unresponsive touchscreen more often and I have to pull out the battery from the phone and turn it on again. The last time this happened I had to do this about 8-10 times before the touchscreen would respond. I have no problems with my keypad, 4 buttons or the trackpad, just the touchscreen
I also did a factory reset and erased all the data that I had on my phone and SD card.
EDIT : I just figured that the touchscreen sometimes starts working if you slide out the keypad. But once the keypad is slid back in, it's back to being unresponsive.
My phone is out of warranty so I can not get a replacement I think.
Does anyone know what could be the problem for such frequent touchscreen unresponsive behavior. After a couple of reboots, everything returns to normal.
Any ideas ? I would appreciate any help..
Thanks a lot...

you got a broken ribbon

Hi there,
Do you mean the slide rail flex cable or the digitizes flex cable ?
Thanks

flex ribbon cable
I would say it's the flex ribbon cable which connects the motherboard piece to the screen and home button piece. I've purchased several "broken" my touch 3g slides from ebay that had either the screen shift problem when the keyboard was slid out or screen that was unresponsive/wouldn't come on. Both problems were fixed by purchasing an inexpensive flex ribbon cable like item 170747702766 on ebay. I watched a video and followed along on youtube /watch?v=-jgFHuVWlig (stop at 7:27 and reverse the process). However, my most used mt3gs is now starting to have the screen shift problem again and needs a new cable... it didn't last as long as I had hoped.

Did you try any custom roms?. reflashing/updating the device?
I guess it must be some driver issue!..

i have the same problem.
Could you fix it?

Seems to be a common issue. I've described the process of replacing the flex ribbon cable here - it's not a rocket science. Or just bring the phone to a serviceman who will do the same (if you lucky enough he could even have a spare cable, but I'd advice you to have your own bought from ebay to be sure).

Touch Screen freeze
Saem persun said:
Seems to be a common issue. I've described the process of replacing the flex ribbon cable here - it's not a rocket science. Or just bring the phone to a serviceman who will do the same (if you lucky enough he could even have a spare cable, but I'd advice you to have your own bought from ebay to be sure).
Click to expand...
Click to collapse
Thank you for the information but another questiion that I do have is where would one get a serviceman that would repair or help repair a phone, usually the technicians are attached to the different cellular carriers and if one dosen't have a contract with them they are not likely to help repair your phone even if it is for a fee. Do you know any serviceman?

need help - touchscreen fix

noticed that my touchscreen is becoming unresponsive lately so i thought that changing the multitouch might solve it. the thing is, after selecting 4 touch, touchscreen becomes totally unresponsive. i tried wipe and even flashing stock os but touchscreen is still the same.
did i screw up my touch screen? how will i know? any known repairs or fix.
thanks

Sounds like your digitalizer (the glass above the screen) is busted and needs replacement. If your phone is under warranty, claim it, if not - get a new digitalizer and if you can't change it yourself, take it to a repair shop.

Changed the digitizer but still no response
Got a headache? It's all in your head!!!

switch ROM
You said that you flashed back to stock, but how about flashing to another ROM, I mean one that has a completly diferent multitouch enabler... that might work.

kherzad said:
You said that you flashed back to stock, but how about flashing to another ROM, I mean one that has a completly diferent multitouch enabler... that might work.
Click to expand...
Click to collapse
i was able to flash stock and it means i have no root nor recovery. and adb debugging is not enabled. i am out of ideas how i will be able to solve this.

After flashing stock ROM do you face the same issue with a new Digitizer?

yes. doesnt respond to anything except volume and power. even the 4 touch buttons doesn't work. i was thinking that i have received a bad digitizer or it is a motherboard issue. with the latter i have no idea how to check

salingpusa said:
yes. doesnt respond to anything except volume and power. even the 4 touch buttons doesn't work. i was thinking that i have received a bad digitizer or it is a motherboard issue. with the latter i have no idea how to check
Click to expand...
Click to collapse
I had recently taken my Defy to a service center. I just wanted to change the earpiece and the side casing. While replacing the side casing (while removing the Digitizer) they damaged the digitizer. The main touch portion was working but the 4 soft keys were not. They replaced the digitizer and everything was fine again (had to pay for it )
If you can carefully handle the phone, you can open up the casing and try reconnecting the digitizer to the board. (Do not remove the digitizer from the casing only reconnect the cable).
Replacement is better done by a service center as it requires careful handing.

I did open the phone, removed and reconnected the cable, still the same. also tried 2 new digitizer still the same result. I guess it us the mother board . Any ideas where to get replacement board ?
Thanks
Got a headache? It's all in your head!!!

i have got the same problem like you and i have solved it.
Do compass calibration like spin the phone 3 times in flat condition (laying down face up), then have the phone standing up and rotate 3 times, then on one side, rotate 3 times and then move your defy in the shape of number "8" in the air. Re-open the screen. it is suppose to bring back your screen work like it was nothing happened.
only for my defy i've tried never did this for another but from what i see you have nothing to lose here

Tried the calibrating thing and also a new digitizer. doesn't work. So it is the motherboard.
Anyone knows where to get mother board
Got a headache? It's all in your head!!!

Getting a new board is like getting a new phone - new IMEI, price for the board should be very similar to the pricw for a new phone too. If you think about it, it IS the phone. What's there in the phone other than the board a screen and a digitizer...

Guess you're right.
Got a headache? It's all in your head!!!

Nexus 7 Touchscreen Suddenly Does Not Respond

Hi Folks,
We've had a 2013 Nexus 7 for 1.5 years and it's been a great device. Always on stock Android OS. so we get OTAs periodically.
While away, the Nexus battery ran down because my daughter had kept it on before we left. We wirelessly charged it again - i.e., the USB port has been broken for the past year - and booted it up.
Despite seeing the usual animated lock screen and hearing notifications in the background, the touch screen was not responding to input.
I tried powering down/up, then got the "Google" logo and a hang.
On a weird idea from a different forum, I powered down, opened the back and reseated the thinner connector which travels over the battery, then rebooted. It worked!
But, the touchscreen is still not responding on the lock screen.
EDIT: Tried a wipe/factory reset from recovery, but the touchscreen is still not responding
Ideas welcome, please.
- wader

Called ASUS and they think it's a hardware fault, for which they estimated a $300+ repair.
Seems I'll need to consider a new purchase or replacement touchscreen on my own. Ugh.
- wader

ooofest said:
Called ASUS and they think it's a hardware fault, for which they estimated a $300+ repair.
Seems I'll need to consider a new purchase or replacement touchscreen on my own. Ugh.
- wader
Click to expand...
Click to collapse
First time I've heard that the touchscreen would die without warnings. I'd bet it wouldn't be the hardware and based thereon, would suggest that you back up the tab, wipe it clean and flash a custom rom as close to the stock thing as possible, like CleanRom and see what it does. Before you do that, you might want to reseat the touchscreen cables - two-pronged connected to the daughter board at the bottom of the tab. Make sure you disconnect the battery prior to disconnecting any cables.

graphdarnell said:
First time I've heard that the touchscreen would die without warnings. I'd bet it wouldn't be the hardware and based thereon, would suggest that you back up the tab, wipe it clean and flash a custom rom as close to the stock thing as possible, like CleanRom and see what it does. Before you do that, you might want to reseat the touchscreen cables - two-pronged connected to the daughter board at the bottom of the tab. Make sure you disconnect the battery prior to disconnecting any cables.
Click to expand...
Click to collapse
Well, I was already on stock and wiped it clean, which unfortunately made no difference.
There is a 2" crack in the glass in the upper left corner, which is new. This makes me believe that my daughter trapped the tablet under some heavy things (without a cover) during a recent trip - normally, this tablet has been drop-proof, so this is a wild notion. I already tried re-seating the ribbon cables, etc.
I did find a like-new replacement nearby on Craigslist for a decent price, so went that route for a quick "fix." Meanwhile, I've ordered a replacement display to see if I can get it working again via a h/w upgrade - will experiment and see what's up.
- wader

ooofest said:
Well, I was already on stock and wiped it clean, which unfortunately made no difference.
There is a 2" crack in the glass in the upper left corner, which is new. This makes me believe that my daughter trapped the tablet under some heavy things (without a cover) during a recent trip - normally, this tablet has been drop-proof, so this is a wild notion. I already tried re-seating the ribbon cables, etc.
I did find a like-new replacement nearby on Craigslist for a decent price, so went that route for a quick "fix." Meanwhile, I've ordered a replacement display to see if I can get it working again via a h/w upgrade - will experiment and see what's up.
- wader
Click to expand...
Click to collapse
A crack in the upper left corner shouldn't affect the whole touchscreen since the cables are located at its lower right corner. When I suggested that you reinstall a rom, I was thinking of the touch firmware being possibly corrupted. Re-flashing a new rom would install it anew; wiping it clean with the current one won't. I've not experienced this with this model, but it did happen to my other Asus models in the past. Leaning heavily on a new touchscreen might be disappointing when the glitch turns out to be software-related. But again, it's your decision. Good luck anyway.

graphdarnell said:
A crack in the upper left corner shouldn't affect the whole touchscreen since the cables are located at its lower right corner. When I suggested that you reinstall a rom, I was thinking of the touch firmware being possibly corrupted. Re-flashing a new rom would install it anew; wiping it clean with the current one won't. I've not experienced this with this model, but it did happen to my other Asus models in the past. Leaning heavily on a new touchscreen might be disappointing when the glitch turns out to be software-related. But again, it's your decision. Good luck anyway.
Click to expand...
Click to collapse
I understood what you suggested, but the touchscreen subsystem suddenly flaking out seemed as much of a longshot as the new crack or generalized crushing pressure hurting the display/ribbon cable connection. IMHO. I'm guessing one area of h/w - cable, screen, etc. - has been compromised.
Upon more deep inspection (this time with my glasses on), there is a looong crack across the entire bottom right corner and a chip near the bottom right-middle. So, my guess that she crushed the device on her trip may not be too far off.
Plus, this stock device has had a faulty USB connector for the past year, so I have no direct means to get another ROM on there, etc. with just h/w buttons.
The replacement is in excellent condition, so this older tablet is now for experimentation, more than anything.
- wader

Black (not working) screen after drop.

Hello comunity
I bought one nexus 2013 wifi... (Second hand) and I am planning to mount it in my car...
well ... i just started preparing the software ...rooting, unlock bootloader and so on ...
then accidently I dropped it on the floor :/
After this the screen is black. It is OK - it is not brocken but is not working at all...
The computer recognizes the Nexus (I can see it from Device menagment in my computer).
Then I opened the Nexus..
Reconnected the battery... and trying to hold the power button for 60 sec...
again nothing worked and the screen is still dead.
Is it possible this to be a problem?
https://goo.gl/photos/k4EYBvWvQynab3v16
seem it is not OK... (There is a black line on the cable ... may be it is a missing part >)
If i buy one of this cables and change it may be the problem would be fixed??
Tnx and Happy new year

Voklav said:
Hello comunity
I bought one nexus 2013 wifi... (Second hand) and I am planning to mount it in my car...
well ... i just started preparing the software ...rooting, unlock bootloader and so on ...
then accidently I dropped it on the floor :/
After this the screen is black. It is OK - it is not brocken but is not working at all...
The computer recognizes the Nexus (I can see it from Device menagment in my computer).
Then I opened the Nexus..
Reconnected the battery... and trying to hold the power button for 60 sec...
again nothing worked and the screen is still dead.
Is it possible this to be a problem?
https://goo.gl/photos/k4EYBvWvQynab3v16
seem it is not OK... (There is a black line on the cable ... may be it is a missing part >)
If i buy one of this cables and change it may be the problem would be fixed??
Tnx and Happy new year
Click to expand...
Click to collapse
Yes, that part has been stripped. Can't tell if that causes the problem, but I'm almost certain it was not caused by the drop since that part was locked inside the connector, unless it had already fallen out when you opened the thing. Where you ripped it when removing, you might want to look inside the connector to make sure the loose bit doesn't remain in there as it could short. I take it you're not in the US. Otherwise, I could mail you an extra cable I have. Good luck with your repair.

Disconnecting the cable caused your issue for sure, be careful before you tinker with devices.

This cable is OK unless you damaged it during disassembly. The most likely failure is the screen. Have a look at it with a lamp at an angle to check for any cracks.
Did you earlier manage to install TWRP? If so boot to recovery and check with ADB file system access.

Well..
Tnx to all of you.
The tablet is working again.
The problem was this cable.
I ordered a new one.
I really couldnt undartand how just one drop can be the reason for damaging the cable.
Smiles