Seems weird, but i saw something similar happen. We were fixing old QNAP server, and it used normal PSU keying. The thing is - it blew PSU capacitors(with a ni

Seems weird, but i saw something similar happen. We were fixing old QNAP server, and it used normal PSU keying. The thing is - it blew PSU capacitors(with a nice small explosion) after being turned on. we suspected that the old QNAP model had proprietary pin layout for the PSU. No labels of course.