After buying a PC from a dealer of shady shady repute, the luckless customer unpacked his new toy and plugged it in to find it Dead On Arrival.
Naturally, after checking the usual things, he called the dealer and explained his problem.
First question from Deviously Evasive Dealer: "Did you check to see whether the power was on?" "Of course." DED: "Did you open the cover and check whether any of the boards had shaken loose in shipping?" "Of course." DED: Then why are you calling me?" "Well, you sold it to me and there has to be some kind of warranty," pleaded the frustrated purchaser.
"Of course there is," replied the DED, "But you voided the warranty when you opened the cover." There are two major products to come out of Berkeley: LSD and UNIX.
We don't believe this to be a coincidence.