mirageforce

If you have manual for your type of motherboard you can find meaning of some sounds there. Three beeps usually mean RAM problem. Some other beeps mean disk problem, or keyboard and so on.
Have you assembled your pc by yourself? Then check every component in there. Look for cooler voltage connector (to mb). Your computer might be overhearing since fan stops running at start. Then bios probably shuts it down for "safety" (read fire) reasons.

If your comp worked normally and stoped suddenly one day then something (some component) might be dead.

Nope. I don't assembled my pc. I bought it from the shop a complete set. If don't mind could u plz show me whish is cooler voltage connector because i'm, quite confusing looking at the system.

I have check my psu even bought a new one in case of emergency but the problem still remain. Any other solution. Thanks for all your kind helps

Hello,I'm newbie here, so i need some advice from all of you. My PC got some kind of problem. When I want to turn it on it turn on for a second or two and then it suddenly turn off followed by beeps like a police siren continuously. May I know what's wrong with my pc. When i looked at the fan it spin for a second and then turn off at the same time as the pc turn off.Here are my specsAMD athlon XP 2.8Abit AN7512 DDRATI Radeon 9550