Hi all. I'm new and need some help. After much effort I managed to get the device to update firmware via the command prompt. I have moved on to try and make a little project with the OLED expansion. I plugged the OLED in and turned the power back on and the Onion 2+ now appears to be dead. I just swapped a new onion 2 into the expansion board and it seems to power on but the other is completely dead- no LED's no life at all. What have I done? Any suggestions?