This is one of the funniest tech support stories I've heard in a long time. Even you non-geeks can appreciate this...
We sold a computer to an elderly lady who took it home. We had tested it, and it worked great at the store. But, when she got it home, she could not get it to turn on. I work on the phone with her for an hour.
[Via The Daily WTF]
"Is everything plugged into the power strip, maam?"
"Yes, everything is."
So, I was sent to her home. Sure enough, everything was plugged into the power strip ... including the power strip.