Touchscreen problem - Acer Iconia A500

Hello,
Was wondering if anyone could give me an idea on a issue im trying to fix with my acer tablet a500. I had replace the a500 motherboard with a a501 everything works like it should but I came across and issue with my touchscreen that theres a spot on the screen that wont seem to work while rest of the screen works fine.
For Example
Say im using the keyboard on the tablet I can hit most buttons but like the K button for example wont work as if its not detecting that im pressing the button while rest of the screen works. If I rotate the screen same spot will not work while rest of the screen works fine. I have took it apart so many times so im not afraid to disassemble the whole thing. I did drop it and I noticed were the screen connection strap has a tear in it and was wondering if that would cause this problem.
Any ideas on how to go about fixing this would be great.

If the flat cable is damaged, it's the most probable cause for the malfunctioning of the touch screen. You should try to replace the cable, or, if not possibile, the whole touch screen.

Related

Help with diagnosing LCD problem

Do I blame the onboard video or the LCD itself for this problem? I've taken the phone apart and re-seated the motherboard connections, which was no help. If I connect using EveryWAN the phone appears to be working fine, in fact I flashed the T-Mobile ROM and than the Button ROM thinking it was a IPL/SPL issue. Even if I try to start in boot loader mode the screen still looks the same.
Just trying to decide If I need to replace the motherboard or the LCD.
Thanks,
Bump back to the top!
Screen seems intact without any damage visible, no cracks or out?
Had this problem once with my old Universal, was the colour transfer wires that were loose, but pretty sure the Uni is totally different to our wizards.
Prehaps open her up and see if theres anything thats loose prehaps.
I had it opened and re-seated both the connecting cables, but no luck.
Ive had this problem with my wizard .. i couldnt find a solution. tho i didnt really try very hard. Basicaly just picked up another one on ebay for like £30 seemed cheaper than spending the time and effort fixing it. I think mine got progressivly worse. It used to do it occasionaly and now just it as soon as its switched on
i have a same sort of problem...
left of the screen fills with lines and the whole screen fades to white.
turning on and of the screen via power button takes it back to normal but then it happens again.
noticed it only happen in portrait so i have to set it to landscape all the time
for some rom and spl's it happens just a few times a day and others i cant use it in portrait.
If i find a solution it might be working for you to
Fading white screen of death
Could be the battery. Have you tried a new battery?
Solved.
The LCD itself was bad.

Screen problem when opening (Wing)...

A friend of mine brought me his Wing to look at for him. If I turn on the phone on it boots up and the screen looks just fine. When I slide the screen opened to use the keyboard the screen freezes and when I close it again it gets all jumbled up. There are lines going through it and I can not make out anything. The phone isn't locking up at this point because I can press menu buttons and other hard buttons and see the screen react, I just can't tell what is happening.
I assume that this is a hardware problem. I was thinking that the cable that connects the screen may have been jarred loose or damaged in some way. If that is the case do you think that it would be as easy as opening it up and repositioning the cable? I don't have any experience with this phone specifically so I don't know if this is a common issue.
I was also wondering if it is possible that this is just a software issue. Maybe the function that rotates the screen for use with the keyboard is messing up and jumbling the horizontal and veritcal lines when going back and forth. I was thinking about doing a hard reset and seeing if this clears up anything. Any thoughts?
I appreciate any help. This forum has always been there when I needed help in the past. I'm sure somebody out there has much more experience and knowledge that I have and can lead me in the right direction.
Thanks for any and all help!!
Update...
So I went ahead and tried the hard reset first hoping that it might be a software issue. I am now at the screen that says "Tap screen to setup your Windows Mobile based device." No screen touches are being recognized. This seems to support my thoughts that there is a loose cable or bad connection. Agree?
I just slid the screen opened to see what would happen and it faded to white.
Yep, if my experience with the Wizard tells me anything, the flex cable from the main body of the phone to the screen is either loose or damaged somehow. Even a small nick or cut into the flex cable will cause it to stop working correctly. I would hunt up the Herald service manual and take your device apart and see what you can find.
Thanks ... I downloaded the service manual and plan on taking it apart. I have to make a run to the store though and buy a small enough Tork screw driver. T5 or T6 I believe.
Thanks again, I will post with my findings when I get going on it.
now what?
So ... I have the phone completely torn apart. I do not see any loose or damaged cables. It was dirty inside the phone but other than that everything looks just fine.
Does anybody have any advice as for things to look for, that might be causing this problem, while I have this thing torn apart?

Major touch screen problem with touch hd!!

touchscreen was working today morning, took battery out for 2 hours, turned it back on and it was working abit weird, and now i cant press any touchscreen buttons atall!
So no softkeys (pick call, home etc.) and nothining on the big screen! I can turn on the phone, press the power button and volume buttons, see my home screen get calls etc.. hard reset twice, took battery out, nothing does it .. gonna try flash it but dont think itll do it ... and ideas?
Im in uk aswell if that makes a diff
Dear All,
I have similar problem. Usuallí I use on my HD NRG ROM. About 3 weeks ago I updated to the latest NRG WM 6.5 23xxx ROM with Sense 2.5 Maxmanila version, and since this upgrade the touch screen position moving randomized up or down from 2 mm to 30mm!!! After this ROM I tryed updating each newer version, but not changed nothing. I need realign the screen about 10 times / day!!! The phone I never dropped or cracked.
Can help me somebody what happened with my HD?
I had this happen to me yesterday. I was surfing on my phone as per the norm. Put my phone down. Got a txt, picked it up and it wouldnt allow me to access it. I thought it must be a freeze as it has happened occasionally.
So I restarted.............and nothing. No response AT ALL from the touch screen.
I have noticed the oily spot problem on the most part of my screen, and thescreen doesnt have that little give it used to when using it (paranoia possibly)
So I can only assume something has given within the screen. Ive been searching all day on the internet for causes and fixes but nothing has come up.
The volume and power buttons work but I cant do anything at all with the phone as its obviously all touch based.
Is this a screen replacement job then or is the whole phone goosed?
Roheelshah if you turn your phone off do you have the massive oily screen thing?
Any help is most appreciated....
I had the same thing, a oily spot, but it was there for months, then i noticed another new spot (looked like a tiny tiny burn) and thats when it stopped working completely... ive ordered a new screen which should be comming in a few days, im hoping thats the issue
will let you know if it works ....
keep me updated if you find anything
thanks!
NECROSTONE said:
I had this happen to me yesterday. I was surfing on my phone as per the norm. Put my phone down. Got a txt, picked it up and it wouldnt allow me to access it. I thought it must be a freeze as it has happened occasionally.
So I restarted.............and nothing. No response AT ALL from the touch screen.
I have noticed the oily spot problem on the most part of my screen, and thescreen doesnt have that little give it used to when using it (paranoia possibly)
So I can only assume something has given within the screen. Ive been searching all day on the internet for causes and fixes but nothing has come up.
The volume and power buttons work but I cant do anything at all with the phone as its obviously all touch based.
Is this a screen replacement job then or is the whole phone goosed?
Roheelshah if you turn your phone off do you have the massive oily screen thing?
Any help is most appreciated....
Click to expand...
Click to collapse
download and install this _HTC Touch HD_TouchHD system.exe
BOLDESH said:
download and install this _HTC Touch HD_TouchHD system.exe
Click to expand...
Click to collapse
whats it do? and where from??
I just posted something like this a few days ago, pulled my phone out and screen wouldnt respond, had these marks all over my screen, "swirly marks" as i describe it, very well could be the oily marks you are talking about. you can move them around with your finger right?
anyway, i took my sim out, tryna find a spare phone, couple hours later the marks were gone and screen started working again, touch wood its been fine since.
no idea what happened, but try letting it air out or something
ok basically i received a new digitizer today (the actual touchscreen) ...
i dismantled the whole phone using the service manual and some video some guy made (VERY HELPFUL, if anyone wants it for any reason i can post a link), ok so i got rid of all the top bits, the circuit boards (or watever theyre called)
I got down to just the bezel, lcd and digitizer (dont know what a bezel is, the lcd is where the display actually is and digitizer is directly stuck ontop of that)
Apparently when replacing the screen, htc have made it so that you have to replace all three of those parts instead of individual ones, but you can buy them seperately so i thought i'd hero it.
i poked out the screen from the frame (some chewingum like stuff holding it in) then i started peeling off the digitizer (if you get one and want to try it you'll know where to peel) ... this was a mistake tho cause the lcd is unbelievebly sensitive so while peeling off it left scratches on the lcd, and me not knowing the lcd is sticky tried to wipe them and use a dust free cloth, which left alot of crap on the actual lcd!
i managed to get the digitizer off and ripped the cable that goes from digitizer to whatever reads our fingers on the screen, took it all off, placed the new one directly ontop and fed the wire exactly how it was for the first screen.
Put it all together again
Now I did mess up my screen badly, but in a good way! .. i now have full touchscreen working (smoother than ever) but my LCD display is near enough gone, so it looks like the screens really really dark, and i have to tilt it at certain angles to see the screen..
After all of this i now have a touch hd i can controll from my pc (using mymobiler) so i can recieve calls, send texts all from my pc when connected thru active sync, can even play teeter ... but not really the same!
I wouldnt recomend anyone to try what i did, although i think its worth the risk as I would have to replace the lcd anyways if i wanted a new screen in the first place... and who knows you might be able to peel the digitizer off clean (NEVER EVER EVER TOUCH LCD WITH ANYTHING!!!).
It all cost me around 10-15£ for the digitizer and screwdrivers and alot of hours dismantling phone compared to 50-100£ for a new lcd.
I am either going to get a new lcd now so i can actually see the screen, or get a new phone.
Sorry for the essay but hopefully this helps someone in any similar situation
if i do get a new lcd will post how it goes and if it sorts out everything
if anyone knows of any other reasons why my lcd would be so dim (brightness is 100%) accept for me getting carried away with it ... help would be appreciated
the_cool said:
I just posted something like this a few days ago, pulled my phone out and screen wouldnt respond, had these marks all over my screen, "swirly marks" as i describe it, very well could be the oily marks you are talking about. you can move them around with your finger right?
anyway, i took my sim out, tryna find a spare phone, couple hours later the marks were gone and screen started working again, touch wood its been fine since.
no idea what happened, but try letting it air out or something
Click to expand...
Click to collapse
Yeah swirly oil marks is how myne started ... i think i finished off the screen by trying to press hard on the mark to try and clear it .. . so be careful with it.. but think that overall the screen had seen better days (course only a few weeks after warrenty finishes) ... all conections inside were ok aswell
doczyus said:
Dear All,
I have similar problem. Usuallí I use on my HD NRG ROM. About 3 weeks ago I updated to the latest NRG WM 6.5 23xxx ROM with Sense 2.5 Maxmanila version, and since this upgrade the touch screen position moving randomized up or down from 2 mm to 30mm!!! After this ROM I tryed updating each newer version, but not changed nothing. I need realign the screen about 10 times / day!!! The phone I never dropped or cracked.
Can help me somebody what happened with my HD?
Click to expand...
Click to collapse
Same here. Touch screen not working. Phone never flashed, droped,...
Any solution?
unfortunately, a friend of mine changed the touchscreen without success. Phone was in perfect state, no drop, no flash. Just the touch not responding. I'm not sure that changing whole part lcd+digitizer solve the problem.
Hi all!
I've got similar problem with my touch HD. It's stock since I bought it. My touch sense was acting weird, like it wasn't properly calibrated. Like, when I press 7 on phone pad, the phone actually presses 1, and if I press 0, phone presses 5 and so on..
I've tried to align the screen, but it doesn't get aligned the first time. I have to repeat the process about 4 times before it gets aligned. That's good for about few minutes and the problem is back. Hard reset was also done, 2 times.
Could this be a fixed with a software update? Does this mean that digitizer will soon be dead?
Thank you for your help
Regards
igothtc2 said:
Hi all!
I've got similar problem with my touch HD. It's stock since I bought it. My touch sense was acting weird, like it wasn't properly calibrated. Like, when I press 7 on phone pad, the phone actually presses 1, and if I press 0, phone presses 5 and so on..
I've tried to align the screen, but it doesn't get aligned the first time. I have to repeat the process about 4 times before it gets aligned. That's good for about few minutes and the problem is back. Hard reset was also done, 2 times.
Could this be a fixed with a software update? Does this mean that digitizer will soon be dead?
Thank you for your help
Regards
Click to expand...
Click to collapse
use ScreenCal to fix it, hopefully it can help you
Hakim Rahman said:
use ScreenCal to fix it, hopefully it can help you
Click to expand...
Click to collapse
Hi!
I've successfuly installed the cab file on my phone's sd card, but the problem is still there. I don't know where the installed files are, do I have to run this application?
Thank you for your help!
Regards
igothtc2 said:
Hi!
I've successfuly installed the cab file on my phone's sd card, but the problem is still there. I don't know where the installed files are, do I have to run this application?
Thank you for your help!
Regards
Click to expand...
Click to collapse
have you hard reset the device after installing the cab file ?? if not do it and see if there are changes...
Hakim Rahman said:
have you hard reset the device after installing the cab file ?? if not do it and see if there are changes...
Click to expand...
Click to collapse
Just did the hard reset. When it asked me to align the screen, I just couldn't align the top left corner. I had to press it like 50 times before cross went to the lower corner. Otherwise, after the align it's good for about couple of seconds and then it's just pressing all over.
I thought I had just some software issues because the screen wasn't dead, it responded to my touch. So, I'll probably have to buy a new screen and digitizer, right? Or do you have any other ideas?
Thank you again for your help!
Regards
firstly screencal installs calibration settings not for blackstone so do not install it, no point. (btw it also increases device touch sensitivity)
secondly you guys should try and install the calibration settings for blackstone, basicly what the align screen does, not sure where to find them for download but i could post the registrys if someone wants to make a .cab from them. (atm i cba making the .cab but i am able to do it )
if the calibration settings do not work i think it is best to buy a new lcd package (or buy new device and give me old one for spares oj)
Rn
hi buddy ! What you mean GSensorCalibrator ??
i didnt mention anything about gsensor calibration dude.
tried and tested screencal the other week and it screwed my blackstone.
install these instead:
*screen calibration, sets the blackstone touch points: (aligning the screen)
if you install a cab with these registrys it should fix the alignment problem.
(if it doesnt then its hardware issue = lcd etc)
[HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\TOUCH]
"MaxCalError"=dword:8
"CalibrationData"="511,542 183,881 183,198 834,197 833,880"
*this one will maximise the touch sensitivity for those that want it:
[HKEY_LOCAL_MACHINE\Drivers\TouchPanel]
"PressureThreshold"=dword:0
Rn
Does anyone have a recommendation where you can buy a digitizer and lcd from?

Touchscreen Issue

Hi. I have had my Nexus 7 for quite a while now and so fdar it had worked perfectly. However today the touchscreen wouldnt work, even after many restarts. Then it suddenly started working again. I flashed back to stock and till then everything was working good again. However once I flashed a custom rom again the thouch screen got messed up and it was as if I was touching the screen when I wasnt. Does anyone know what's going on with my tablet ?
Thanks
I was mistaken when I thought it was related to software and I found the real issue. When applying pressure on the left side of the frame of the tablet, the screen will start registering touvhes on it's own. Upon using Multitouch Visualizer I noticed that after i pressed the left frame of the screen, the tablet would register touches on the far right of the screen on it's own. Is there any way I can fix this ?

New LCD poor responsiveness

Hi guys
I bought G2 with broken screen, replaced that with new screen - everything was fine. I did upgraded rom to higher version, after that screen become very difficult to operate. I had to press it very hard to make it work, and obviously no swipe option.
I disconnected all pieces and put together and there was no changes, however I realised that when I push back of the motherboard with force sometimes screen become responsive as normal, it works couple of seconds and become difficult again.
I have tried to localise the exact place when is a problem but it's like a lottery, sometimes it works in left corner, sometimes I have to twist motherboard a little bit.
I have read about motherboard problems on G2, but in this case it stopped to work after rom upgrade and it sometimes works fine so there is a chance to fix it I presume.
Any ideas folks?

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