Blank Monitor screen,cpu beeps.

Hello,

I was having this computer without any trouble for the last five years. Yesterday for the first time I loaded some games on it. As I was playing a game. the monitor screen suddenly went black. I tried to restart the computer, it did not. The CPU beeps with breaks after almost 5 or seven seconds. When I put the computer on the power runs, but the computer does not start.

Please advise. Also suggest some technician. I reside around Cannought place area in New Delhi.
Thanks .