hello i think there is a short circuit in my Geeetech Sanguinololu Controller board for RepRap Prusa I3 MK8.
I have a geeetech prusa i3 Aluminium from august 2016
And i have done a few prints on it so far. But suddenly it just broke...
When i turn on power, my lcd just show black squares.(all fans spins normal) But it kills my computer. (black screen an it needs do be restarted) thats why i think it maybe sends 12v in usb cable
If i connect only usb to board, lcd works normal and i can connect in repetier-host. so firmware and the rest on the board is ok i guess?
I have disconected every cable and stepper drivers connected to the board exept power in and lcd. I have checked backside of the board to see if anything was shortcircuting.
I have checked v input 11.95
What is wrong??
