Computer will not turn on...

[HailAngus]

Computer was turned off for atleast 8 hours while I was at school, I came home and turned on my computer. The lights and everything came on, you know the whole deal and it appeared to be working correctly, and then after about a second after I turned it on it turned off. I checked all connections and all are fine, and the socket is giving out electricity... First thought, bad PSU, but the motherboard green light is on, so it is receiving power. I have an ASUS P4R800-V Deluxe if this helps at all... Anybody have any possible resolutions...

 

[HailAngus]

umm well i unplugged everything and pulled it out and checked for any obvious problems and found nothing but dust and gave up and put it all back and then it turned on... why was it acting up?

 

[sivart]

probably the dust causing excess heat. Just a guess.

 

[amdskip]

Cheap power supply is my guess. Sure it still provides power but it is not of a high enough quality. What power supply do you have? Dust should not cause that much or a problem actually.