How can I identify the problem with my home-built computer?

Episode 984 (2:08:34)

Matthew from France

Matthew built his own PC, but he's having issues with it. Leo says one of the problems with building his own computer is that he doesn't have anyone to turn to for support when something goes wrong. Matthew has been overclocking his PC and he suspects issues with the power supply. Leo says that power supply's are cheap and it sounds like it's just failing. Replacing it is easy and affordable. They are easy enough to pull out, but he should make sure he gets the right power supply that has the proper connections.