First post, by VioletGiraffe
I have bought a vintage desktop PC case with an AT PSU, and when I power it on, I observe the PSU fan failing to spin. The 12 V output voltage is about 4 volts, the 5 V voltage is ~1.5 volts. So I was about to contact the seller and ask for partial refund, but then I had a thought: is it possible that it doesn't work properly because there is no load? I did not connect anything because naturally I don't want to kill any hardware with a suspicious PSU that I'm just turning on for the first time.
P. S. I opened the PSU, there are no visible problems - not a single bulged or deformed electrolytic capacitor, the main coil looks good, too.