I found a couple of Commodore 64 power supplies and decided that before I would even consider using them or perhaps even selling them, it was time to torture test them to see if they are working, or if they will or will not fail during this sort of testing.
And what better way to test a 64, the power supply and a disk drive, well, it is time to crank up some music courtesy of the SID chip and let it play, play, play...