sound of siren

[Nati]

Hello everybody,

i turned on my computer yesterday and after 3 seconds
there was a sound of siren (like a fire truck) and the computer
immediatley turned itself off.

i have to mark that the siren was still singing altough the com' was off...

what should be the problem?? how can i fix it?

[patio]

Probably overheating or something is hooked up wrong...
Have you moved the machine recently and/or added any new hardware ? ?
Post alot more info about the machine as well.