Replacement screen not turning on after reboot

Hi folks,

I recently got a free Pixel 7 Pro with a busted screen from a friend. Got a new one from AliExpress (original Google parts are not available here in Brazil, or far too expensive), followed the iFixit Guide, replaced the screen, everything went fine. Good colors, solid image, touch works, all good. Until I reboot or shut down the phone.

Every single time I do this, the new screen does not turn on, and the only way I have found to get it back is to unplug and plug it again. I can hear the phone chime or vibrate, so it is on.

I thought I had a bad screen, filed a complaint with the seller, got a new one, SAME behavior. So now I'm starting to think that 1) I broke something else during the replacement (Unlikely. I'm not a pro, but I do have experience, and I am very careful) or 2) Two screens from the same (high-rated) vendor are bad somehow?

Has anyone seen this? The phone was OFF during the replacement, and I already tried disconnecting/reconnecting the battery.

Regards,

Adding further context to my own question...

The behavior I described is consistent with the dreaded "Black Screen" bug. But I get it EVERY time I reboot the device. Holding Power + Vol UP for about 1 minute forces a reboot and puts things back on track, so IN THEORY everything should be fine. But knowing that the bug exists, and I haven't "solved" it, will bug me in the long run.

Tried updating the phone to Android 15 (was still on 14), but the issue persists.