[Q] HW0002 Touchscreen Problems. - EVO 4G Q&A, Help & Troubleshooting

Recently my EVO has stopped responding to touch inputs. It will wake with the power button but sometimes the touchscreen will not respond. Sometime I'll be able to launch an application and then it will stop. Sometimes it will work fine for minutes/hours and then the problem will surface. I've tried multiple ROMs and it doesn't seem to matter what software (AOSP or Sense) the phone is running.
Any ideas?

Sounds like it may be a hardware problem and not a software one. Have you had any problems with the LCD or digitizer?

Tripp-phpBB said:
Sounds like it may be a hardware problem and not a software one. Have you had any problems with the LCD or digitizer?
Click to expand...
Click to collapse
well if its not responding then it is the digitizer. but before you dump a bunch of money into a new digitizer or new phone let me ask u this.
does it only not work while plugged in and charging? because that is kinda a common problem. as long as it works when not plugged in then ur fine.

I haven't specifically tested it to see whether or not being plugged in affects the problem but another symptom is that when it goes on the fritz you can be hitting the back or home area at the bottom and it will register the touch somewhere near the top of the screen.
Does that narrow the possibilities?

Definitely sounds like a screen/digitizer issue.
If you have the protection plan from Sprint, you can take to a repair center and they will replace for you. No charge.

Thanks for the help. My local Sprint store will replace it for $35. So we'll see if that's the issue.
Gotta flash over to stock ROM so they'll work on it though.
EDIT:
Spoke to soon. Technician at the Sprint store won't work on it. They're trying to claim there is water damage when there is none. I guess I'll have to do it myself.

Related

[Q] Screen stops responding / ghost touching issues.

It's becoming more and more often that my screen stops responding, or pressing keys or doing actions by itself. I have to either screen off -> on my phone, or pull the battery. I'm becoming so frustrated with it that I'm about to trash the phone and buy a new one. The trashing part will make me feel better.. -.-
Do you think this is a hardware problem? Is it worth a replacement from Sprint? Is it related to my software? What do you guys think could be causing this issue with my phone? I'm gonna call Sprint and ***** for a while, thank you for your responses.
Could be your digitizer going bad which is a fairly cheap and easy DIY replacement if your handy with that sort of thing or comfortable giving it a try
Sent from my Classic-EViLizED-ToMAToFiED-EVo4g-
Do you think this is a hardware problem? Is it worth a replacement from Sprint? Is it related to my software?
Click to expand...
Click to collapse
The quickest way to see if its hardware or software related, is to do a factory reset, or flash a stock sprint rom if you are rooted. If it fixes it, then its software, if not then its hardware
I had the same issue after testing out stock roms and such to see it turned out to be a hardware issue. I took it back to sprint and got a warranty replacement.
This happens to me sometimes when plugged in and charging (AC). Have you tried plugging it in/unplugging it to see if you regain control?

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!!!

Weird touch screen.

Its been some days, I'm experiencing this weird touch screen problem.
My DZ touch screen doesn't respond properly.
For example:
If i see an image and slide just one finger up and down then it would zoom in and out. And then the whole screen becomes unresponsive.
It seems as if, its touched by itself. Even the softkeys would go numb. Only the haptic feedback of my search button works at that moment.
But the trackpad works perfectly.
But, If i lock and unlock the screen using power buttons, it would work properly for some few moment and then again the problem repeats.
At present I'm repeating this process of locking and unlocking screen to use my phone.
One even worst weird thing is that, if the device is connected to a charger and kept on the table or floor. This problem doesn't occur.
I have done system format, restored my nandroids and even changed Roms. The problem still exists.
Please note, i don't use any Casing or covers that would press the device hard for malfunctioning of screen. I have even removed and replaced my screen guard.
I'm sure, its not a software issue.
And even i dont think its a strip issue, because i dont use my physical keyboard always.
Can anyone say what hardware issue it might be..?
Or what i need to do? I'm really out of options.
Do i have to replace my whole screen or the digitizer..?
Thanks...
Thats no fun,
As you stated it's more than likely a hardware fault, the two most likely culprits would be the digitizer or the main flex cable
Which would be this and this
both relatively easy to replace depending on your experience
in 4.x and up ROMs check the developers setting to show touch or use apps like
z device test
or
yet another multitouch test
these wont help you fix the issue but may show you where the bad points are on the screen
best of luck
I know the problematic spot. Its near Search softkey. Even Yet another multi-touch test would stuck at that spot....
As you can see in the image, that i'm not holding anywhere, still it shows that somewhere around Search softkey its touched by itself.
In second image, If i move my fingers around, it would show the other touch responds, but if i slide near search, it would go and stuck there itself.
So, i guess i would first go with the flex cable.
In actuality I'm leaning toward the digitizer in your case, but its possible to be either.
And if you have a spare phone it may be worth disassembling even without buying anything. On a G1 I once fixed a similar issue just taking out the digitizer and cleaning the contacts on the ribbon and the edges of it as well, when I put it back it worked like new. I think some dust may have gotten into the edges but it may be worth a shot before buying anything... But could make matters worse so if you don't have a spare, buy parts first
Best of luck
Sent from my Nexus 7 using XDA Premium 4 mobile app
I guess i should try disassembling and clean it first. If it still persists then i would go for digitizer.
And thanks for giving a hope.
Thanks...

D855 OEM screen replaced but touch not working

Hello all
I dropped my G3 a few months ago and cracked the screen. Recently got it replaced with a brand new OEM screen.
When I boot the phone, the touch works properly, can navigate the menus, everything. As soon as I turn the screen off, only knock on works but the touch doesn't work. I can't unlock the phone unless I remove the battery and boot again. There's no touch available in TWRP as well.
I'm currently flashing a stock ROM, Android L, hoping that it will solve the problem. If it doesn't, I fear I may have to resort to other methods. If any of you have experienced this, please let me know as to what steps you've taken to remedy it.
Thank you in advance.
sarfaraaz said:
Hello all
I dropped my G3 a few months ago and cracked the screen. Recently got it replaced with a brand new OEM screen.
When I boot the phone, the touch works properly, can navigate the menus, everything. As soon as I turn the screen off, only knock on works but the touch doesn't work. I can't unlock the phone unless I remove the battery and boot again. There's no touch available in TWRP as well.
I'm currently flashing a stock ROM, Android L, hoping that it will solve the problem. If it doesn't, I fear I may have to resort to other methods. If any of you have experienced this, please let me know as to what steps you've taken to remedy it.
Thank you in advance.
Click to expand...
Click to collapse
Did you do it yourself or did you send it in or take it to a repair shop? If you didn't do it yourself, I would take it back and demand they fix it at no extra cost.
If you did it yourself, did you get the screen with the digitizer along with it? Just replacing the screen, on most phones, without getting a digitizer already fused to it means trouble.
Also, if you did it yourself, check all connections. I know with my daughters iPod, I had to replace the screen and it wasn't easy and the first time, all the touch areas didn't work correctly. You also have to be careful that you don't ruin the digitizer when installing the screen.
Also, you have to be real careful of all the connectors and the board. One wrong move and you could tear a cable, crack the main board, etc. I refuse to do any more self maintenance on devices like this. Best to either shell out the cash to have it fixed, or just get a new one. That, or also get extended warranties to cover damage to the device.
Also, did you have it in a case protector? If not, you might want to go get one. Otterbox's are worth the money. Yes, it makes the phone bulkier, but I'd rather pay $40 or so for their protector which really helps.
iBolski said:
Did you do it yourself or did you send it in or take it to a repair shop? If you didn't do it yourself, I would take it back and demand they fix it at no extra cost.
If you did it yourself, did you get the screen with the digitizer along with it? Just replacing the screen, on most phones, without getting a digitizer already fused to it means trouble.
Also, if you did it yourself, check all connections. I know with my daughters iPod, I had to replace the screen and it wasn't easy and the first time, all the touch areas didn't work correctly. You also have to be careful that you don't ruin the digitizer when installing the screen.
Also, you have to be real careful of all the connectors and the board. One wrong move and you could tear a cable, crack the main board, etc. I refuse to do any more self maintenance on devices like this. Best to either shell out the cash to have it fixed, or just get a new one. That, or also get extended warranties to cover damage to the device.
Also, did you have it in a case protector? If not, you might want to go get one. Otterbox's are worth the money. Yes, it makes the phone bulkier, but I'd rather pay $40 or so for their protector which really helps.
Click to expand...
Click to collapse
A friend who's an LG technician did it for me. Replaced the screen and digitizer I believe. He tested it on another G3 and the screen works perfectly. Given that the screen works on another G3, do you think it is likely that this is a software issue and not hardware?
I have a case that came with the phone but I've never used it, however, that's definitely going to change from now on.
sarfaraaz said:
A friend who's an LG technician did it for me. Replaced the screen and digitizer I believe. He tested it on another G3 and the screen works perfectly. Given that the screen works on another G3, do you think it is likely that this is a software issue and not hardware?
I have a case that came with the phone but I've never used it, however, that's definitely going to change from now on.
Click to expand...
Click to collapse
I can't even pretend to know what might be the issue. I would take it back to your friend and ask him to look at it, if not replace it again.
iBolski said:
I can't even pretend to know what might be the issue. I would take it back to your friend and ask him to look at it, if not replace it again.
Click to expand...
Click to collapse
Yeah, he asked me to return it to stock and then test it seeing as his internet speed sucks, and if it still sin't working then he'll take it back to work on it.
Will report back if the software update works or not.
Just an update, flashing to stock didn't work. Only way I can use the phone now is to set the screen to never turn off
sarfaraaz said:
Just an update, flashing to stock didn't work. Only way I can use the phone now is to set the screen to never turn off
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Click to collapse
Have same problem and solved yet.
Just try to double click power button when there is image on screen after that touchscreen is working.
Stopper said:
Have same problem and solved yet.
Just try to double click power button when there is image on screen after that touchscreen is working.
Click to expand...
Click to collapse
I've tried everything, finally figured out that it only works with the quick circle case. If I close the case and wait for the circle to show up then open it, touch works. It's probably something internal that's messed up but I've since given the phone to LG themselves for a quote and possible repair.
sarfaraaz said:
[...] I've since given the phone to LG themselves for a quote and possible repair.
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Any news since?

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