I picked up a new power board (rotten dog) because my original board had other problems but the magnet worked. The new board also worked initially but with days the magnet stopped working. I reinstalled the original power board and the magnet works so there isn't an issue with the wiring or diode on the magnet. I swapped in another power board from another machine (rottendog) and again the magnet worked initially but went out after a few days. The original board went back in and the magnet works. Any ideas why the rottendog board has problems with the magnet?

Yeah I haven't updated my profile. I'll contact rottendog, thanks.