PC not turning on! help!

[Guest]

Ok last night my PC turned off while i was watching youtube and everything was fine so i turned it back on and it turned on.. didnt think anything abbout it so i go to sleep then i wake up and turn on my PC and it isnt turning on, it turned on once so i put back my system to its spot and re-turned it on and it didnt come on. whats wrong!!!

 

EDIT: MY PSU IS FINE!! I JUST CHECKED IT WITH THE OL GREEN WIRE/BLACK WIRE TRICK

[Guest]

Euuh... Did you check the power connector on your motherboard?

[Karumu]

is the 24 pin connector plugged in properly? if you moved it it could have come loose, check all the connectors are properly seated

[NUFCThomas]

is there any lights on your mobo that are on when the power is turned on at the wall?

[MikeTz]

Check the stickie and do whatever it says there. If nothing fixes it then something is probably broken

http://linustechtips.com/main/topic/42440-readme-how-to-respond-to-a-no-post-or-no-power-up-situation/

[LogicalDrm]

Do the base tests. Clear CMOS, remove everything except one stick of ram and try again. If you have speaker for mobo, use it.

[P3rad0X]

Can you test with a different power supply?

 

Could be short curcuit protection.

[rammer166]

it could be the power supply