Unreponsive touchscreen - Desire HD Q&A, Help & Troubleshooting

Dear XDA members,
I have a Desire HD with a cracked screen.
I replaced the whole screen+ digitizer (the big unit)
After replacing the screen is working, the touchscreen is unresponsive.
working:
- touchbutton lights
- sd card
- my phone ring when inc call
- rom boots nice
Did fullwipe and reinstall rom - not worked
Any way of calibrating the screen?
Or can someone point me to the connection of the touchscreen?
(so i know wich one the check)
Thanks in advance!

joostnl said:
Dear XDA members,
I have a Desire HD with a cracked screen.
I replaced the whole screen+ digitizer (the big unit)
After replacing the screen is working, the touchscreen is unresponsive.
working:
- touchbutton lights
- sd card
- my phone ring when inc call
- rom boots nice
Did fullwipe and reinstall rom - not worked
Any way of calibrating the screen?
Or can someone point me to the connection of the touchscreen?
(so i know wich one the check)
Thanks in advance!
Click to expand...
Click to collapse
did u assembly touch screen and digitizer or was it assembled from the shop (digitizer and the touch screen). if u assembled it by urself then you have broken it and if it was assembled from the shop thn the assembly was faulty.

Seems as if the digitizer is not functioning. Check to see if its connections are properly placed.

Related

Are LCD and touchscreen functionning while phone is dismantled???

Hello!
Everything is in the title!
I've dismantled my HTC Touch Pro II in order to change my broken LCD (but still functionning). I've changed the LCD panel AND the touchscreen stuck all together. But it seems not OK, as there's nothing on the screen, the touch panel doesn't respond. I know everything else is OK as I'm able to connect to my phone using MyMobiler...
First, I reassembled it, but the screens (LCD+touch panel) weren't responding, so I dismantled it again. Main board on my left, bezel+LCD+touch panel on my right...
Before assemblying it again, I'd like to know if the "rubber tape" with metal inside (used to fix flex cable ribbons) is absolutly needed for the screens to work or not?
I hope you'll have clues for me.

[Q] Hardware question. See no information on display.

After I have changed the broken display on DHD for the new set: Display + Digitizer, the new display doesn't work.
When I press start the vibro works only for seconds, and then I hear the system boot soud, but there aren't any information on the display, I can see only the backlight.
What is the problem?
Mtl_x5 said:
After I have changed the broken display on DHD for the new set: Display + Digitizer, the new display doesn't work.
When I press start the vibro works only for seconds, and then I hear the system boot soud, but there aren't any information on the display, I can see only the backlight.
What is the problem?
Click to expand...
Click to collapse
I dont know too much about the hardware side of phones, but I know a lot about computers so I may be of some help lol
How many wires/contacts are there between the display and any external components such as the motherboard?
If only one, make sure it is plugged in correctly, the right way round, and plugged in all the way.
If there are more than one, make sure that if they have the same connector that you havent got them mixed up, such as the one that controls what displays and the one that supplies power.
This is all I can help with, sorry.
Thanks!
There is only one contact between the display and the motherboard.
I have connected the old broken display... got the same result - no info on the display. ((

loose digitizer

Hi,
after i managed to fix the issues of my aria (with your help, thanks) i figured out that the touch screen isn't fully responding to my fingers.
at normal - all of the screen responds. except of two mm of the perimeter, and the nav keys.
if i push the top of the screen, the nav keys start working, but the screen isn't responding at all.
so i guess it is little loose.
what can i do to fix it back to normal functioning state?
thanks.
im just going to take a long shot and say taht the digitizer has been replaced before , and the adhesive used was too thick
try installing this
http://www.durapowerglobal.com/HTC-Aria-Digitizer-Adhesive-_p_1147.html

Xperia S backlight problem

Hello. I have a problem with the backlight of my xperia S. Today I disassembled the phone because of a problem with the sim card slot, but then the backlight of display and the bottom transparent plastic stopped working. I see that the display is showing something and touch is working fine, but no light. Everything seems to be plugged correctly. Please help asap..
ninja91 said:
Hello. I have a problem with the backlight of my xperia S. Today I disassembled the phone because of a problem with the sim card slot, but then the backlight of display and the bottom transparent plastic stopped working. I see that the display is showing something and touch is working fine, but no light. Everything seems to be plugged correctly. Please help asap..
Click to expand...
Click to collapse
Same issue over here. I only disconnected the foil connector next to the accu and reconnected it but the backlite is no moreworking.
Have you fixed it?
Did you fixed it?
same here, i switched back to my original battery and the backlight just didn't go on, i can see that the led is fine and even the bottom leds are fine, and the touch is working perfectly but the only thing i can do is unlock the screen and answer call (i can do the other things but I just cant really write texts without seeing what im replying to)
would like any of you guy to help me, thanks in advance!!!
ninja91 said:
Hello. I have a problem with the backlight of my xperia S. Today I disassembled the phone because of a problem with the sim card slot, but then the backlight of display and the bottom transparent plastic stopped working. I see that the display is showing something and touch is working fine, but no light. Everything seems to be plugged correctly. Please help asap..
Click to expand...
Click to collapse
just removing the lcd flex cable doesnt solve the problem..do the process in three steps
step1: remove battery pin(inbuilt battery) or remove battery..then press the power button for 5seconds..and then putin the battery..
step2:remove the lcd flex cable and the touch equiliser pin also..remove the battery pin(if inbuilt battery)..or simply remove battery..do every thing in the same process..dont jumble..after doing that..again press the power button for 5 seconds again..and putin the battery
step3:now assemble the entire mobile again with screws..because there are certain connections with motherboard and screen which will come in contact only after placing them tightly with screws
now poweron the mobile..this time it works..
the main reason is the failure of inductor component on the mother board(cant tell the accurate component name)..
aravindA8 said:
just removing the lcd flex cable doesnt solve the problem..do the process in three steps
step1: remove battery pin(inbuilt battery) or remove battery..then press the power button for 5seconds..and then putin the battery..
step2:remove the lcd flex cable and the touch equiliser pin also..remove the battery pin(if inbuilt battery)..or simply remove battery..do every thing in the same process..dont jumble..after doing that..again press the power button for 5 seconds again..and putin the battery
step3:now assemble the entire mobile again with screws..because there are certain connections with motherboard and screen which will come in contact only after placing them tightly with screws
now poweron the mobile..this time it works..
the main reason is the failure of inductor component on the mother board(cant tell the accurate component name)..
Click to expand...
Click to collapse
Nope it doesn't worked..
100% my very same problem
I can confirm this problem was fixed by this
http://forum.gsmhosting.com/vbb/f261/xperia-s-lt26i-no-light-solution-1655166/
But for god's sake, be careful with tinning. A drop too much and you have a shortcut.
EDIT: intriguingly, I noticed I have another close up photo of basically the same area (please, don't bother with oxidation trails).
Sent from my Xperia S using XDA Free mobile app

[Q] Bottom half of screen not responsive

Hello,
I'm having a problem with my Arc regarding the touch screen, the bottom part of the screen, where usually the icons and slide bar to unlock are is not working, tapping or sliding on it doesn't work. I was using CM10 originally and I tried flashing a stock firmware to double check whether it is the ROM's problem, but now i'm stuck at the setup wizard because I cannot click on the next button.
I went through the whole wizard once by accident and went into the service test for touch screen, the bottom part of the screen totally cannot be detected at all.
Can I ask that if I need to get one of phone part replaced (because my warrantly ran out), which part should I replace?
Thanks
Sry mate but i think it could be screen problem,the best thing you can do is to send it to service repair and see what they think of you're issue.I hope you'll get it fix cheep.Good luck
Sent from Xperia Arc

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