Develop Bugs

[Q] Advice on unlock/digitiser issue

Hi
I upgraded to my new DHD less than 3 weeks ago. It is not rooted and I did the recent OTA update over Christmas.
Over the last couple of days I have started to experience difficulty unlocking the device on the slide-to-unlock screen. The problem seems intermittent - somethimes it will unlock fine, and other times the slider just seems to "get stuck" at the bottom of the screen.
At first I thought this a bug or something, but after some investigation I am concerned there is a problem with the digitiser. I opened a picture and zoomed in to fill the screen and tested the touchscreen in different places by sliding the picture around. What I found was that the bottom 1cm of the screen above the keys does not respond properly to Up and Down swipes. It is fine however with side-to-side and also individual taps. This is obviously a problem when trying to move the unlock slider!
I've had a screen protector on for about a week - I don't imagine this has caused the issue but haven't removed it to test as yet as I don't have a spare. Aside from this, the device has been very well looked after, definitely no bumps etc and kept in an HTC leather pouch.
Any ideas? Should I return it to CW?
Thanks

OK, I seem to have resolved this for the time being but expect the problem to return.
I downloaded a screen test app that allows you to draw on the screen and got some very strange results. A 1cm band of screen about 1cm up from the bottom was completely unresponsive. Trying to draw a horizontal line within this band would result in lines being drawn either above or below it, or strange vertical lines "jumping" around. The rest of the screen was fine. I realised this is why I have been struggling to close the keyboard - the button is placed within this band and trying to press it would result in on of the buttons above or below being pressed. Also have had problems with the sapce bar.
I did a restart (not fast) and this has resolved the issue, however I expect it may return as I did a restart only yesterday.
At least it is obviously software and not the digitiser....

Hi again. As expected, the issue returned after a couple of hours. This time however, restarting is not making a difference.
I resorted to a hard rest, which has not changed anything either.
Any help/ideas would really be appreciated...

Best to return it for repairs or exchange. Seems like the digitiser is faulty.
Sent from my Desire HD using XDA App

olivierlee said:
Best to return it for repairs or exchange. Seems like the digitiser is faulty.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
I agree, this definitely sounds like a hardware problem.

touch screen starting to not work

hey,
I had a problem a few days ago where some parts of my touch screen (near the home, menu, etc. buttons) started to not work. and today when I woke up, the whole screen is not working. It seems to respond every now and then, but barely.
I'm assuming this to be a hardware problem, but I am not sure. Anybody had a similar problem before? disassembly would be my last resort, how should I go about fixing this? Thanks.

I have the same problem. about a half inch band across the very bottom of the screen. Weird thing is sometimes the whole screen will become unresponsive (if it stays on for too long) then turning the screen off and on and unlocking the phone makes it go away for a while. The digitizer glass in my phone seems to need replacing. I've scoped a replacement out online (don't have the link) for about 30 bucks. there are also many assembly/disassembly videos for the phone. Looks like it will take a lot to get the digitizer out.

I was having the same problem... Just replaced the digitizer and still have the same issues... anyone have an idea?

I have a similar problem but with the soft keyboard. It becomes unresponsive very often..tried many roms and diff softkeyboards but the ptoblem still there
Sent from my HTC Vision using xda premium

[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!

Xperia plays touchscreen

hey there guys and girls,
This is my first post and was just wondering about my xperia plays touchscreen. I bought it almost a year ago and since i got it the problem has been occuring. Its not major dont get me wrong but it can be really annoying when i am texting my frineds. What happens is that i will press a letter then it will just decide to press a bunch if other letters next to them. Also the keyboard will randomly go down so ill end up clicking send and completely wasting a text.
Any help would be great... Thanks xD

Large fingers? lets hope its not a digitizer problem but you did state its been happening since you got the phone. the xperia play does seem to me to be more sensitive to the amount of pressure needed or not needed; or is it just me?
Got used to using swype keyboard on my sgs and haven't used the stock keyboard on the play.
you could try to clear data for the keyboard Settings>Applications>Manage Applications>All>"keyboard"
maybe another keyboard will solve your problem entirely, there are plenty of them on the market/store.
this is just one as there are many
https://play.google.com/store/apps/...xLDEsImNvbS52bGx3cC5pbnB1dG1ldGhvZC5sYXRpbiJd
edit: forgot to mention, if you install this or any other input method you will first need to enable it in Settings>Language & keyboard>"keyboard"
just tick the box next to the keyboard and it will give you a prompt; read>OK
then say in messaging just press and hold on the text input field and select input method>select keyboard you want to use
also, when your keyboard disappears for whatever reason or doesn't show when needed you can press and hold the menu button for a few seconds to bring your keyboard up or make it go away.

I pulled off the screen protector and that seemed to fix it for me.

i've been having the exact same problem, it seems to occur mostly when my phone is charging or when it's too warm. Didn't bother sending it back though, but yes, it can be verry annoying when trying to text

Don't worry, its a standard Sony Ericsson issue. Usually occurs when the device overheats.
Reboot or look into ROM flashing and the problem will be resolved
Sent from my Xperia Play using xda premium

Mine does that when there's moisture on the screen, or when plugged into the charger. I've found typing to be much less annoying in wet conditions when using Swype.
Dry off your screen often enough and it should help. Removing the anti-shatter film (which is next to useless anyway) also makes a difference.
Sent from a parallel universe

Welcome to XDA!
Try solutions posted above.
If You ever need to test any piece of hardware on your phone, try accesing serice menu by typing this code in Dialler:
*#*#7378423#*#*
From there You can access Service tests menu and test Your Touch Screen/Earphone/Display just to mention a few.
Also screen protector isn't any good for me, standard keyboard is too small and stock firmware is to laggy to type messages. Solution is easy if You are ready to give your phone a boost by flashing it as mentioned by someone else above.

Wow, there is a great amount of different anwsers
I remember that someone on these forums said that Xplay has problems with multitouch regonizing (or something)
Basicly, the touch points wont reset unless you do something (i dont remember what)
Personaly, i just press powerbutto to "shut down" my screen, press main menu butto and open the lock, its all back to normal
EDIT: wait few seconds (like 5 or so) before you reopen the screen

i'm having a similiar problem, i charged my phone with 5v a couple times, so the last week, the touchscreen doesn't work. sometimes it does, it has been abit tricky. it like works sometimes, with an effort of constantly mashing the screen (with swipes and presses), but the last 24 hours, it's been practically dead. every other part of the phone works, like LED, pad controls, speaker, etc etc, just touchscreen is dead... any solution, methods?

Maison Looi said:
i'm having a similiar problem, i charged my phone with 5v a couple times, so the last week, the touchscreen doesn't work. sometimes it does, it has been abit tricky. it like works sometimes, with an effort of constantly mashing the screen (with swipes and presses), but the last 24 hours, it's been practically dead. every other part of the phone works, like LED, pad controls, speaker, etc etc, just touchscreen is dead... any solution, methods?
Click to expand...
Click to collapse
Broken digitizer maybe?
Sent from a parallel universe

captain67 said:
Broken digitizer maybe?
Sent from a parallel universe
Click to expand...
Click to collapse
how would one go about fixing this?

captain67 said:
Broken digitizer maybe?
Sent from a parallel universe
Click to expand...
Click to collapse
if so, replacement is easy right?
same time is, sometimes it's been working and sometimes not...

bigcez74 said:
how would one go about fixing this?
Click to expand...
Click to collapse
Honestly, I have no idea. I just know that the digitizer is what makes the touch screen work, and that there have been xda users buying them for replacement parts before.
Sent from Asgard

I have been getting this problem when coming in from outside. I can hold my finger about 1cm above the touchscreen and it will type random letters as well. Seems to be affected worse in bottom left hand corner for me. It settles back down after a while of being indoors. Its really weird though.
Sent from my R800i using Tapatalk

simacca said:
I have been getting this problem when coming in from outside. I can hold my finger about 1cm above the touchscreen and it will type random letters as well. Seems to be affected worse in bottom left hand corner for me. It settles back down after a while of being indoors. Its really weird though.
Sent from my R800i using Tapatalk
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Click to collapse
That's because the difference in temperature and humidity causes condensation to gather on the screen, temporarily. Capacitive touch screens work by conducting electricity, and moisture is conductive.
Sent from Asgard

captain67 said:
That's because the difference in temperature and humidity causes condensation to gather on the screen, temporarily. Capacitive touch screens work by conducting electricity, and moisture is conductive.
Sent from Asgard
Click to expand...
Click to collapse
Ahh, I see. That makes sense. I took the factory installed screen protector today as well. I'm hoping this will help too.
Sent from my R800i using Tapatalk

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...