RE: U2412M, Repair a defective diode
I ended up de soldering the 4 diodes on the board and sure enough a uf5404 was dead. It was right next to an identical one, so I bet it was the exact same problem. I have just replaced it with a uf5408 and it is working again.
This is not my photo but this was the bad diode.
I also hope this helps someone in the future