PC not starting

abeer72

Honorable
Feb 24, 2014
316
0
10,810
Hello,
Greetings,

Today My pc shut down without a warning and now whenever i try to switch it on the power button led switches on for about 0.2 seconds then nothing happens.the fans are off but i am getting power on my usb wifi card,the card's led is on,when i unplug my pc and drain the power using the power button the card's led switched off,which is a good sign because that means that wifi card doesn't have an inbuilt battery.
I changed the power cable,cleared the CMOS,checked the front panel connectors but nothing happened.and the cpu IS NOT THERMAL TRIPPING because max temp was 76°c after 3 hours under 100% load on all cores
Please help.

Thank you.