My dad has a computer that's several years old and is having issues with the PSU in the computer. The computer would not turn on and the light on the back of the PSU, which should be solid, was blinking. He brought it up to my place but when I plugged it in it powered up fine, no problems. At this point we thought it was the power strip he was using. When he got home and switched out the power strip he was having the problem again, even with the new strip that I gave him. The same problem happens in other outlets. Everything else plugged in on the strip or the outlet works fine. SO at this point I think the PSU just needs to be replaced, but I have no idea what could be causing this problem. Any ideas?