My BigBox dual didn't startup today when I powered it on. No beep from rumba. No text on LCD, only back light. Octopi can't connect. This is what it looks like with the electronics cover removed. I haven't used the printer for a week. Last print ran out of filament. I heated up the extruder from LCD. removed the filament. Shutdown the Raspberry Pi from Octoprint and then cut the power. Today the Rasperry Pi starts up, but the printer does not. I guess its something with the RUMBA, but don't really know. Any suggestions what I should do?