Touchscreen stopped working after soft brick...

[crypysmoker]

Ok..
I had this phone for a while and I started using it again recently. I have fully replaced the digitizer/lcd bezel before with no problems (been a phone repair tech for 10 years) And it has worked fine.

The other night I reverted it back to stock because it seems to be the only way to get a constant data signal. Worked fine. I then updated it to the newest OTA update without a problem.

I then rebooted it and it stuck on a black screen loop with the buttons going on and off for hours. I spent 7 hours trying to figure out what was wrong, flashing, re flashing.. Nothing. Finally I get CWM recovery installed and find out my SD card is fried. So I put a new one in, and transfer over the roms I want t flash. 3 different roms, all with no touch screen.
Revert back to stock, still no touch screen.

Could something have gone bad on the board to have caused this? Is there something system wise not getting wiped that may cause this? Its to much of a coincidence that the touch screen and buttons would go out after all this happened.

Any help would be appreciated. Im waiting on a new digitizer now to check because Ive already gone over all the connections. But if its something software wise, Id like to try that before doing another digitizer replacement.

Thanks

 

[blackbeasst]

funny you made this thread. i just got my hands on a soft bricked g2x that was stuck on the blue lg logo. after a quick nvflash it boots right up......but with no touchscreen. not sure if it ever worked as im not the original owner.

but i'll be keeping my eyes out on this thread for sure!

 

[grantusmantus]

Id give a pretty to see inside both of your phones. Sounds like a bad contact on the ribbons.or one of them may have been ripped during a screen installation. I've never heard of the screen just up and quoting working without some major stuff happening to the phone. My guess is these screens were replaced with the wrong screen.just a guess though.

Sent from my LG-P999

 

[crypysmoker]

Id give a pretty to see inside both of your phones. Sounds like a bad contact on the ribbons.or one of them may have been ripped during a screen installation. I've never heard of the screen just up and quoting working without some major stuff happening to the phone. My guess is these screens were replaced with the wrong screen.just a guess though.

Sent from my LG-P999

I have done phone repairs for quite a few years, It wasnt a wrong screen and has worked fine for a year since its replacement. I have already opened the phone again and made sure all contacts were fine. What Im trying to figure out is if there is maybe some part of the system/boot that holds the touchscreen drivers and they have bee erased?

Again, I find its a huge coincidence that it worked fine up until this happened then as soon as its booting again, stops working... Which is why I think its a software issue.

 

[monte666]

Try touching the corners of the screen after booting up start with the top left and go clockwise. One of the roms used to mess up the connectivity between phone and screen. And that is supposed to reset the touch screen. A old g1 trick

Sent from my SGH-T999 using xda premium