Hello!
Yesterday, my LG G2 D800 had a backlight issue. I was able to use my phone in direct light and utilize the touch screen in its entirety at the time.
I took off the back cover and reconnected the Backlight cable to the motherboard, and that solved my issue regarding that. However, after the fix, my touch screen no longer recognizes inputs, even in Recovery Mode (TWRP, so it needs touch functionality).
I tried to disconnect & reconnect all cables on my motherboard, but my touch screen still does not recognize inputs at all.
What could have caused this? I took off the back cover gently with a plastic spudge, and only removed the bottom motherboard cover that had the backlight cable attached.
tldr
1) Backlight stopped working, but touch worked
2) Re-connected backlight cable. Backlight works, touch does not work
3) Reconnected all motherboard cables. Backlight works, touch does not work
Any help would be appreciated!
Related
Hi, i have quite a strange problem. On my MDA vario the touch screen only registers touch when the phone is closed. As soon as i start to slide it open (before the screen turns to landscape) the touch registration already stops working.
I've already tried different roms, and currently use Windows Mobile 6.1, but it doesn't really seem to help.
Any ideas on how to fix this?
Thanks,
Steven
The ribbon touchscreen ribbon cable could be damaged or has partially came of the board.
you will need to dismantle the phone and check the cable, note that its soldered and can be tricky to resolder.
So this was my first breakdown of a phone...my brother gave me an HD2 with a non-responsive digitizer, everything else seemed to work just fine.
I disassembled it, accidently tearing the flex cable after it gets thin and goes to the volume buttons. Anyway...I replaced the digitizer...thinking I could just modify the volume via software controls, and stupid me had previously set the hd2 to boot into magicdlr always when the phone turned on. So when I turned on the phone I couldn't do anything because it would boot into magicdlr and I had no volume buttons to scroll up and down, and the option selected was boot into windows which was not on the phone (only cm7 was at this time).
Anyway...after getting a replacement flex cable, and reassembling everything, I couldn't get the lcd to work. Backlight would light up, but no picture, no sound, just a vibrate and the backlight turning on. I tore it down, triple checked all the connections, and still the same thing
So I tried a seperate lcd assembly, tripled checked all connections, and still same issue as the above paragraph, backlight but nothing else when I try to power on. I also retried the old flex cable (the one without the volume connector) and that didn't make a difference either.
My only guess is that I messed up the lcd connector on the mainboard, even though it doesn't look visibly damaged in anyway. Does anybody have any other ideas/suggestions?? I would love to get this up and running as its been my first smartphone project...I've done lots of works on desktops and laptops but never smartphones.
gdawson6 said:
My only guess is that I messed up the lcd connector on the mainboard, even though it doesn't look visibly damaged in anyway.
Click to expand...
Click to collapse
This is my suspicion too!Even not visible at first sight, try again with a magnifier!
Good luck!
Yesterday I was working on my HTC HD2, flashed WP7 Mango on it, and opened it again to align the plastic keys with the hardware keys undeneath. It didn’t really work out, so I carefully seperated the digitizer from the display to realign theglass abovethe keys. Now The keys work perfectly, but the screen doesn’t react anymore. I have no clue what could’ve went wrong, the digitzer flex cable is still perfect, aswell are the others which connect the screen to the motherboard. Anyone have a clue what could’ve went wrong? I hope it can get fixed easily
I’ll try to hold the ‘end call key’ while using the display. Seems like that will help to entight the connection.
Fix: So I took the Display out again and checked the connection of the digitizer at the back of the screen. It was loose. So i've put it in place and fixed the connection with some extra tape.
My Atrix's screen randomly stopped displaying anything. You can see that the backlight turns on and off but nothing ever displays. The screen isn't physically damaged and the touch sensor is also functioning just fine. If I plug it into my Lapdock - I can use the phone with no issues, I'll just never get any sort of display on the cellphone's screen (Outputs to Lapdock's screen just fine).
Any ideas or suggestions?
are you able to adjust screen settings when you're on lapdock? (and does this change anything?)
It does sound a hardware issue with your screen... maybe others on here can offer more help
Just tried playing around with the settings - no luck
Do you think maybe the display cable somehow disconnected? I'm not sure how the Atrix is designed but I think you'd normally have a separate cable for backlight, touch, and display. Maybe I'll try disassembling it and report back.
My daughter's device has been having all sorts of problems. Her backlight stopped working so I replaced the Digitizer and the LCD screen but that didn't help at all. The calibration doesn't work and the screen won't rotate. In addition, her headphone jack is on the blink as well. Do I need to replace the motherboard flex cable or is there something else going on? The ambient light sensor seems to be on the fritz as well which might explain the backlight not working. The phone is using stock Android. Thanks for all and any help.