seems as if my ESPaper 4.2 got caught by a Virus. (sadly no good joke nowadays, I know)
I just get week signs of life from the device. When I plug in the USB-to-Serial converter ("programmer") and set the baudrate to 74880 it shows, depending on button pressed:
ets Jan 8 2013,rst cause:1, boot mode:(3,7)
ets Jan 8 2013,rst cause:1, boot mode:(3,0)
Screen does not change, still shows last update from 12.02.2020.
Any suggestions to reanimate the patient are highly welcome!