[Q] Changed the main flex ribbon cable and its panel, touch screen error.

[borgwarrior]

Hi,

My wifi and bt modules didn't work for the past two months, and after searching trough the Q&A forums, I came to the conclusion that I have to change the ribbon cable, perhaps thats the problem.

So, I've ordered the panel, and it arrived yesterday, it was this piece:

I've swapped it with the old panel, phone fired up nicely, I even saw the BT connections logo appear on the status bar. Yay.




But.

The touch screen doesn't register my touches anywhere on the screen. I've checked the connections, everything connects good.
I've dismissed the idea of a faulty digitizer, since before the ribbon cable/panel switch, everything was working as it's supposed to be.
I'm fully out of ideas, so I'm doing these steps as a last resort: (I'm currently at the third step)

1. Discharge the phone all the way (until it shuts down).
2. Remove the battery and press the power button (as if you were trying to turn the phone on).
3. Leave the phone without the battery overnight (or for at least an hour).
4. Put the battery back and charge the phone without touching the screen.

Make sure you don't touch the screen whenever you're charging, until the issue disappears. This should happen within 2-3 days. If the problem persists, you ether did something wrong, or (as explained above) you have a different issue... Most common related problem is a faulty digitizer.

(source: http://forum.xda-developers.com/showthread.php?t=1239238)

If this fails, the last option I see could be this: http://forum.xda-developers.com/showthread.php?t=1360638 (thank god I have a backup)
Please note, that I've tried the responsiveness of the screen with both with and without the battery cover installed, so I've dismissed the little silver pin as the issue. And as I said the touch screen was fully working before the cable/ribbon swap. Touch doesn't even work in recovery.


So (after a long intro), my question would be, does anyone have any ideas, what could be wrong? TBH, I don't want to buy a new digitizer (even if thats the issue), because I don't want to spend any more $ on this phone (bought a new battery, battery door, some misc stuff)



PS:
I haven't changed anything software/firmware wise during/before/after the swap.

Current setup is:

ROM: latest android1234567 CM11
Kernel: Sultans r53, slight undervolt, slight underclock
Recovery: TWRP
S-OFF

Thanks in advance!

 

[Supreme_One]

Hi,

My wifi and bt modules didn't work for the past two months, and after searching trough the Q&A forums, I came to the conclusion that I have to change the ribbon cable, perhaps thats the problem.

So, I've ordered the panel, and it arrived yesterday, it was this piece:

I've swapped it with the old panel, phone fired up nicely, I even saw the BT connections logo appear on the status bar. Yay.




But.

The touch screen doesn't register my touches anywhere on the screen. I've checked the connections, everything connects good.
I've dismissed the idea of a faulty digitizer, since before the ribbon cable/panel switch, everything was working as it's supposed to be.
I'm fully out of ideas, so I'm doing these steps as a last resort: (I'm currently at the third step)
If this fails, the last option I see could be this: http://forum.xda-developers.com/showthread.php?t=1360638 (thank god I have a backup)
Please note, that I've tried the responsiveness of the screen with both with and without the battery cover installed, so I've dismissed the little silver pin as the issue. And as I said the touch screen was fully working before the cable/ribbon swap. Touch doesn't even work in recovery.


So (after a long intro), my question would be, does anyone have any ideas, what could be wrong? TBH, I don't want to buy a new digitizer (even if thats the issue), because I don't want to spend any more $ on this phone (bought a new battery, battery door, some misc stuff)



PS:
I haven't changed anything software/firmware wise during/before/after the swap.

Current setup is:

ROM: latest android1234567 CM11
Kernel: Sultans r53, slight undervolt, slight underclock
Recovery: TWRP
S-OFF

Thanks in advance!

I've the same problem also replaced the cable/ribbon. I've tried everything software related.