I think the joke i am about to tell is very old, may be i heard this joke on BBC when Personal Computer was getting available.
One man bought PC and he was very happy with it. But after bringing it, he assembled everything from top to bottom.
When he pushes Start Button on the CPU, it was not starting. After long procedure of trying, he then called the mechanic.
and the mechanic was also confused about why not working.
then our INDIAN "CHACHA CHOWDHURY" enters in the room and see both idiots have not plugged the main cable with electric socket.