Develop Bugs

Anyone's touchscreen ever failed??

My desire z is going back for warranty tomorrow ...
The touchscreen and the buttons just under it stopped working without any warning.
Anyone else had similar issues??
Now unrooted with the latest ruu.
Back to my magic
Sent from my HTC Magic using XDA App

When you say it stopped working, did you by any chance have the phone on a worktop? or was you holding it in your hand?
There are reported issues with phones not working all the time when on a worktop, however mine always works when its in my hand.

When my phone is laying flat on any surface the screen just refuses to respond... however if I angle it just slightly it works just fine, or if I pick it up.

I have the same issue when its in the car dock. I didn't have the issue when I was running the stock bell rom this only happened when I installed cyanogen 6.1

My g2's touchscreen gets super lllaagggyyy, like laggy as crap whenever it is connected to the charger @ near full charge. It's random...yet it's not, like for instance..I can put it on the charger and initially it's very responsive. Then, after a few minutes charging the screen *seems* to be unresponsive, I just have to swipe it slowly and it jerks by @ like..5fps seemingly. This has happened on every rom ive tried so far from stock to CM.
Just installed MIUI and haven't had a chance to test..i'm assuming it's hardware related though.

When I First got my G2, The TMo Rep asked me to open it up at the store since i was getting the first one from that store and the touch screen didnt work at all, we turned it off and on and nada. So they replaced it with another one and it worked just fine. Other than that little problem i never had a issue on my G2 as far as touch screen freezing goes

Seems like shoddy hardware to me... I've never dropped the phone.. its always been in a protective cover.
Although I couldn't help thinking.. maybe all the extreme overclocking / general heating up of the phone may have contributed??
Sent from my HTC Magic using XDA App

I have never OC my desire Z (not G2) but I have noticed the exact same symptoms of an unresponsive touch screen after flashing cyanogen 6.1.
I returned back to my stock rom and everything is back to normal.
I haven't had a problem since..

yes, when its on a worktop (table, desk, anything not my hand) and in a dock -- its not as responsive as you'd expect. I have to hold it and caress it with my warm loving hands to get it to respond.
now ---
this is not related to CM 6.1. at all. Ive flashed a lot of things since visionary and its happened on every single rom.
Id go get that phone out of the mail if I were you OP.

I have also noticed the problem with touch screen responsiveness when my G2 is mounted in a car holder.
I have figured that you just have to keep one finger on the aluminium body and the problem is gone. I have to admit that this is somewhat bizarre and I have never had this problem before with my G1 using the same car holder. Seems that there is an issue with electric isolation? I don't exactly understand how capacitive touchscreen works so can't really explain where the dog lies buried.

Maybe this is a feature. Protection and saves battery.
vision...

squbel said:
I have also noticed the problem with touch screen responsiveness when my G2 is mounted in a car holder.
I have figured that you just have to keep one finger on the aluminium body and the problem is gone. I have to admit that this is somewhat bizarre and I have never had this problem before with my G1 using the same car holder. Seems that there is an issue with electric isolation? I don't exactly understand how capacitive touchscreen works so can't really explain where the dog lies buried.
Click to expand...
Click to collapse
The same for my DZ - it is kinda weird, because if the phone is for example in the car holder it is impossible to use the touchscreen unless I put another finger on the phones housing. I tried different roms already, but the 'error' is still there.
It would be interesting if all users have the same problem or if it is just a few examples of phones out there.
Thanks,
Robert

Wow,.... only just noticed this a few days ago. Along with it not vibrating on incoming SMS, i'm starting to get slightly ticked off.

yeah happens to mine too =P

happens to mine also, nothing we can do about this?

[Q] HW0002 Touchscreen Problems.

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.

[Q] bizarre screen glitch

When closed my screen works just fine, and when I open for the keyboard it STILL works just fine, except that the whole screen shifts upward, so that part of the taskbar is actually off of the screen. If I open it slowly it seems like about at 10% open the screen flips horizontal, as it should, but then at about 80% of the way open the whole screen shifts upward until part of it is offscreen. Its not nonfunctional at all, but it is a nuisance, especially when playing any games I have the hardkeys setup as a controller. I've tried a full wipe and rom re-install and that didn't fix it. Also it seems like I've had to do a factory wipe more than once recently because the Home and Search touch areas have stopped working. Is there a weird software glitch going on or is my touchscreen on the way out?

I'm either going to just replace the screen for 35 bucks because its already kinda screwy, but if that won't also solve the weird screen shift issue ill just buy a new phone, any ideas?
Sent from my T-Mobile G2 using XDA App

Ok - so I think its hardware because the screen shifts even when the phones still booting. Would a new lcd fix this maybe?
Sent from my T-Mobile G2 using XDA App

I had the exact same problem. Your issue is in your ribbon cable, I was able to get my phone replaced but if that isn't an option for you, you can buy a ribbon cable and follow a very easy tutorial to install it
Sent from my Bulletproof G2

awesome, I've taken apart the phone a few times before, so now that I know the issue I can repair it finally! thank you so much for replying!! Which Ribbon cable are we talking about?

It is the ribbon cable that connects the screen to the keyboard through the z-hinge. I've never replaced it myself, but if your phone is completely normal closed and then distorts as it opens, then it definetely sounds like the ribbon cable has bad contact as it's stretched. It's really one of the only things it can be, if it were your lcd then the distortion would persist even in portait I would think
Sent from my Bulletproof G2

I must agree with the above poster, seems like its the ribbon too!

[Q] Hardware Issues?

Hi,
My friend has a MT3GS as a backup phone and he lent it to me to see if I can fix an issue with it.
The phone's touch screen and keys below the screen do not respond to any input. The backlights on the keys still work.
Everything else including the LCD screen, keyboard, power, volume keys still work normally.
Its S-ON running stock 2.1 and its in relatively good condition. I did a factory reset through HBOOT and the issue is still there. Is this common and is it fixable?
Thanks.
Sent from my SGH-T679 using Tapatalk 2

It's the flex ribbon. I had to replace the one on my original slide. Easy to fix though, took me around 30 minutes start to finish.

RazoE said:
It's the flex ribbon. I had to replace the one on my original slide. Easy to fix though, took me around 30 minutes start to finish.
Click to expand...
Click to collapse
Thanks I just noticed the ribbon was ripped and sticking out above the keyboard. We were trying to figure out what it was. At least we have an answer now.

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...