If your Windows PC turns on and off repeatedly but shows no display, the solutions provided in this article will help you. Such types of issues usually occur due to hardware faults. The fault may also ...

I'd guess you are looking at a cap failure in the original PSU. 386 era is what, early 90s. 30+ years is a good run. If a replacement PSU doesn't have a switch, you could always hook it to a surge ...