I tried both of my devices and more than one OLED (of the same type). I flashed firmware-tbeam-1.2.28.bin.
Any idea?
Update:
One additional detail for the completeness here. I’ve not yet solvdered the OLEC but used the small foamy-thingy to have some reasonable contact. This can’t be the reason, no?!
Update2:
Soldered it in the meantime but didn’t helped unfortunately.
That looks a lot bigger than the 0.96" ones. What size and resolution is it?
My guess is that if it is not a 0.96" OLED, then it is likely a driver issue as I believe the current build does not cater for larger or outsized screens.