Hi to all. Today i have connected arduino mega on pc and flashed marlin firmware. After with ramps 1.4 and connected to 12v plugged to my pc but at instant my notebook shutdown and never turn on. Its possible 12v goes to my usb ?
Had this happen to mine when I had the endstops wired improperly. Laptop didn’t turn on for a while and even then I had to take the battery out.