I did not use printer for a while (couple of months). Today when I tried to print, printer stucks at first layer and layer count was 0. I tried to print different gcode files including demo ones which comes with printer without success.
I decided to upgrade firmware (from 1.15 to 1.18). I inserted SD card and power up the printer. Screen was dark for about 30 minutes. After power cycle printer stops to boot with or without SD card.
Any advices? Should I order replacement controller board or there is any possibility to reprogram controller board?