When Jeff tried to turn on his computer, it didn't do anything. No fans, no beeps, it was silent. He unplugged the computer, plugged it back in, and then it started up just fine. Since Jeff's computer is 6 years old, Leo says it may just be that the power switch is failing after years of use. It also could be a flakey power supply, or possibly something more serious such as a bad motherboard. Leo doesn't suspect the hard drive is at fault here. As long as it's working fine now, Leo doesn't think it's necessary to get a new computer, but he should definitely make sure all of his data is backed up!