Hello Felix,
Yes it had the factory default code with the vivid animations and it worked fine, I uploaded the UiFlow code and that worked as well, then I tried out some Arduino IDE examples and upon upload, it went black and did not revert not even when completely doing the factory reset with the M5Burner. It does upload the demos and seems to boot and do the thing but it just does not show anything anymore.

Does the display have any internal memory or something that I could erase?

Thank you,
Constantin

@felmue said in M5 Core seems to work but display stays black:

rdware configuration

So if in your case M5 Core (A) and M5 C

Hello,
the same thing happened to mine also, any idea what to try next? I have a M5Core2.
I am not able to return it for a change.
I have tried uploading the firmware, I hear the sounds of the factory default demo, and the touchscreen works(I hear the sounds of the demo when touching). But it does not display anything.
Thank you,
Constantin