Packard bell desktop PC cuts after 3 seconds.

[super jumbe]

I have a problem, my motherboard which is Mcp73vt-pm from Packard bell 2424x when I turn on the machine and u can hear the fans spin for like 3 seconds then it cuts out?

I replaced a working PSU but no joy, I replaced new memories still no joy, could it be a motherboard?

Thanks for your help.

[iGame]

Are you hearing any beeps when starting your PC, its a possibility it could be your mobo, try using a more powerful psu.

Hope this Helps

[Liteace]

It maybe the main CPU over heating, take off the heatsink clean off all the old and put some new thermal paste on it, make sure the heatsink is seated properly and try again

[Meat-Head]

i had one once no idea what it was.

was bleeping lik made when powered (just board on the desk) - when i connected the monitor to it, came up on screen,

ACTUNG FAN NOT TURNING - plugged in a fan - 3 wires sorted.

think it was the case fan