Touch does not work when changing screen - Xiaomi Mi Pad 4 Questions & Answers

Hello good. I changed the screen yesterday because it was a little broken and it turns out that I put the new one and it looks perfectly but the touch does not work. As much as I have tried nothing. I have changed the cable that goes from the motherboard to the screen and nothing. I put another screen that I had that looked bad but it worked perfectly and the same thing happens, the touch does not work. What do you think it may be? Am I going to change the rom to see if it can be that?

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HD2 No Screen

Qeustion
My HD screen is off, and i cant seem to get it on again.
I just was working on it 1hour ago, took it out of my pocket and see that i have no screen.
Rebooted the phone, but no succes .. i see the screen turning on, but it light-gray (backlight) but no actual info/colors etc, also tryd a soft reset, no succes.
I have the Energy ROM Com5 build from 8July with the new 2.12 radio rom.
Could it be that in some way the screen died?
Hope someone can help me, im @ work now so i cant connect it with the PC.
When im home im planning to reflash the device ..
Thanks!
Weird
I just pressed a button and the screen turned on, and the colours/info just slowely fade away ... weird.
Could it be that the touchscreen is not oke anymore?
Or could it be a problem in the radio/rom i use? (and therefore a reflash could fix this?)
Hope its a easy sollution, otherwise ill be flashing it to stock and get it fixed by HTC.
Very very strange.
It seems to work again.
Anyone think i should reflash it to stock and try get a new one?
Are these signs of a screen going defect?
I dont know, first phone for me with touchscreen.
I would suspect a faulty screen, if it is still within warranty i would deffinately get a new one, however yes, try going back to stock first, see if it helps, it may be just a bad flash.
screen problem
I've had this and similar problems with my HD2, now on the 5th replacement from HTC in just 6 months of owning the phone. I also had the same problem on my HTC HD previously. Press the power key and just the buttons at the bottom light up but no response from the screen. Also had exactly the same problem your experiencing where you can faintly see the screen but not lit up. Flash it to stock rom and return to HTC for repair.
BEWARE!!! take some pics with date stamps of your handset before returning. They sent me 3 handsets all with the glass front panel not fitted correctly. Check the return handset carefully, you should be able to feel a lip between the casing and the screen as the screen is set a fraction lower than the casing. THis should be uniform all around. They tried telling me that i had damaged it myself despite calling them as soon as the handset had been delivered back to me.
micky9869 said:
Press the power key and just the buttons at the bottom light up but no response from the screen.
Click to expand...
Click to collapse
That's 'sleep of death', which affects loads of htc devices.
Oke i will stock it soon and return for repair.
I think its idd a screen problem, cause when the screen isnt functioning anymore, and when i put my ear on the glass, i hear a little squishing sound, like air is escaping .. it doesnt do that when the screen shows info/colour.

Screen problems...

Hi all!
My friend loved my mozart, so decided to get himself one!
BUT, annoyingly, there seems to be a problem with the screen...
Sometimes it just wont detect that you are touching it etc.
Sometimes it will work for a little while, or even just a split second and think your pressing instead of sliding your finger.
i HAVE already replaced the screen thinking this would solve it, but its EXACTLY the same
Is there anything else i could try, or is it just a screwed unit?
Cheers
Keith
BUMPZ!!!
anyone???
you got a screen protector on it? before i got my screen protector on it, it worked good. but after then it sometimes didnt respond to touches. sometimes especially when it was hot
ive answered this 2 times alread, try to search
flash the previous firmware back and itll work, its worked for mine

[Q] touchscreen not working

I have a Galaxy S3 that I have been running CM 10.2 on for quite some time. Today I dropped the phone and cracked the screen. The phone still worked perfectly in every way despite the cracked screen. I used it for a few hours after without any issues. I took it to someone today to replace the screen assembly. When I got the phone back it turns on and the screen looks fine but it hangs on the samsung screen for 3-5 minutes before booting in to anything (booting the rom, recovery mode, download mode etc. all take 3-5 minutes to start) when the phone finally boots the touch screen does not work at all. All buttons work fine, including the bottom buttons (back and settings) for touch but no where else does the screen respond to touch.
So far I've tried:
- wiping cache
- factory reset
- re-installed CM 10.2 rom
- Took the back off the phone and checked all the connections, unclipped and clipped back in to be sure they were connected ok.
- Completely removed battery and all sim/sd cards for an hour
At this point I'm not sure if I'm dealing with a hardware issue (maybe they guy screwed something up when replacing the screen) or the digitizer/screen he used is faulty? I know this doesn't neccessarily mean anything but when I got it back the new screen still had the protective film etc. on it so I'm almost positive the screen assembly the guy used was at least new.
And I don't really understand where the 3-5 minute boot issue could come from? I wouldn't think it would be related to the screen/digitizer but I suppose anything is possible. What could explain this?
Is there any way this could be a software issue or any other troubleshooting I can attempt?
jfall said:
I have a Galaxy S3 that I have been running CM 10.2 on for quite some time. Today I dropped the phone and cracked the screen. The phone still worked perfectly in every way despite the cracked screen. I used it for a few hours after without any issues. I took it to someone today to replace the screen assembly. When I got the phone back it turns on and the screen looks fine but it hangs on the samsung screen for 3-5 minutes before booting in to anything (booting the rom, recovery mode, download mode etc. all take 3-5 minutes to start) when the phone finally boots the touch screen does not work at all. All buttons work fine, including the bottom buttons (back and settings) for touch but no where else does the screen respond to touch.
So far I've tried:
- wiping cache
- factory reset
- re-installed CM 10.2 rom
- Took the back off the phone and checked all the connections, unclipped and clipped back in to be sure they were connected ok.
- Completely removed battery and all sim/sd cards for an hour
At this point I'm not sure if I'm dealing with a hardware issue (maybe they guy screwed something up when replacing the screen) or the digitizer/screen he used is faulty? I know this doesn't neccessarily mean anything but when I got it back the new screen still had the protective film etc. on it so I'm almost positive the screen assembly the guy used was at least new.
And I don't really understand where the 3-5 minute boot issue could come from? I wouldn't think it would be related to the screen/digitizer but I suppose anything is possible. What could explain this?
Is there any way this could be a software issue or any other troubleshooting I can attempt?
Click to expand...
Click to collapse
Go and talk to the person who replaced your screen.. maybe has used faulty screen and also may be he has changed with some of the faulty parts..
suyash1629 said:
Go and talk to the person who replaced your screen.. maybe has used faulty screen and also may be he has changed with some of the faulty parts..
Click to expand...
Click to collapse
Very strange, but it looks like it was indeed a software issue after all. For some reason changing the screen out while having CM 10.2 installed did not play well together. I did a full wipe and went back to stock rom and touch is working now. I may try a new install of CM again to see what happens. Odd
jfall said:
Very strange, but it looks like it was indeed a software issue after all. For some reason changing the screen out while having CM 10.2 installed did not play well together. I did a full wipe and went back to stock rom and touch is working now. I may try a new install of CM again to see what happens. Odd
Click to expand...
Click to collapse
Strange issue.. never had it ever, m flashing CM from more than a year.. Try to do a new flash downloading new files..

[Q] LGE Nexus 4 new LCD touch not works

My phone's LCD was broken, and I wanted to change it. I ordered a new LCD with assembly and connected phone to this one (changed old front with this one). First of them worked well, but was broken after one month, I was my fault. But it already works, touch works very good. In second and third one, after installing touch not worked. But I put it some minutes, then it started recognizing touches. Worked for more than a week, and yesterday night my phone turned off because of battery. Today I charged it, turned on and now touch not works again. When I press to screen hardly or press in somewhere from the back it recognizes touches. What can be problem? I searched about it but all results were about problems with broken glass, but my problem is different.
Thanks...

LCD Backlight is on but there's no video output

Hello!
My phone fell from a high place some weeks ago and the screen shattered. Touch was unresponsive, clicking everywehere, but LCD was fine, i could see everything on screen normally.
Ordered a new screen. Changed it, but when I turned it on, only backlight of the LCD was visible, but it was displaying nothing. I thought it was a defective screen (either way, it was, lots of stuck pixels), sent it back and bought another from the same seller. When I changed it and turned it on, again, no video output, lcd would light on but woundn't display nothing on screen. Googled a bit, found out it could be a defective fuse on the motherboard, and that soldering it again would solve. I know nothing about this kind of stuff, so I picked up a tweezers and apllied a little force on every fuse, because I thougth that way I could try to solve it. Well, it worked, kinda. I put the screen above that blue plastic glue only for testing, and it worked, I felt reliefed for seeing sony boot logo again. Figuring out it had worked, i took out the screen, took out the blue plastic, and glued the screen back on. For my surprise, it had the same problem as before, and it doesn't matter what I do now, it wont work anymore, only displays a black backlight with no video.
Could anyone help me out with this? Give me a hint of why it worked once but not anymore. Could it be there's really a defective fuse, or it was just a coincidence that it worked after it had force apllied? Also, the Screen flex is kinda loose, it keeps coming off all the time, and it's really hard to plug it to the LCD sometimes, is it supposed to be like that, or could it be the culprit? Also, touch is working normally, i can't see nothing on screen but i can click and feel it vibrating.
It's kind of a big text, but that's the way I could explain it. Sorry for the bad english, it's not my native language.
And thanks in advance if anyone can help!

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