Replacement screen disconnects after back frame is screwed on

[robthebold]

I cracked my (original) Pinephone screen and got a replacement. Installation seemed ok, and I snapped the back frame on and put in the battery to make sure everything was ok. Booted, unlocked, logged in, great.

So I replaced the 15 screws and snapped the back cover on for more testing, and after a short while, the screen wouldn't wake up. I plugged it in to my computer USB, and the pinephone was recognized, so it's running, motherboard working, daughterboard working, just no display. I assumed I made a bad connection and disassembled and detached, cleaned, and re-attached the display cable. Snapped the back frame back on and put in the battery and all was fine.

Again, I replaced the screws and rechecked. Now the screen doesn't seem to unlock. On a very close look, it seems the backlight comes on but the display itself isn't responding.

Repeating the process, everything seems to work, including the display, until I install the back frame screws.  WTH am I doing wrong here? I don't think I'm over-tightening the screws -- I don't even know why that would be a problem.

What's going on here? Why does the screen work until I screw down the back frame? What do I need to do to get my phone up and running while fully assembled?

Ideas? Thanks!

just in case, check software issues first, like updating system or test different distribution. if i recall correctly, some bugs may cause similar behavior.

Thanks.

The first time this occurred after the screen replacement, I thought I'd messed up something in the hardware. I was booting PMOS/Phosh off the emmc, so instead I tried a version installed on SD and got the same result of no screen but device seemed to be running when plugged into USB. Wondering if that SD was messed up, I tried a different SD with Phosh/PMOS Edge and got the same result. I haven't yet tried a different distro, but I've got a pile of SDs, so I guess I'll give another one a try next.

OK, I tried all the SD cards I had. First the Ubuntu Touch cards, that worked for a little while then the screen stopped working. Tried SFOS and megi's multi-boot, too. No screen. Two different PMOS/Edge versions. Back to UT, I can even hear the camera aperture click and then get the audible message signal for external drive connected, but no screen.

Long story short: like I said, the screen stops working when I tighten down the back screws. So back to that. What's going on? Anyone? Bueller? Is this pinephone just f-ed up? I'm thinking that's the case. Do I trash it? Well, that would suck. I'd love to use this device again . . .