I’m getting the same exact issue. It started before I did a recent apt upgrade – I’m using the script someone shared here that turns off the display after 5 minutes, and it started just not waking back up.
Around this time, I also started seeing an error message as I was properly shutting down that said something about dbus (maybe?) not being able to communicate with the display.
Then, the display started failing to turn on on the first boot, but would work after a hard shutdown and booting again. That worked for two sessions, and now the display isn’t turning on at all. Sometimes I’m getting a quick flash of the screen, then just nothing.
Is the best route to just send it in at this point?