my pc is sometimes refusing to turn on, help please!

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Joined
1 May 2004
Posts
144
hi guys, if anyone could help me with this problem id very much appreciate it.

i built this pc about a year ago and it hasnt missed a beat until yesterday afternoon, when after installing new ati graphics drivers and rebooting it wouldnt turn back on. when i pressed the power button the power led would come on, the fans would spin for a few seconds and then it would turn off again, no beeping.

after trying again and again again ,i got it to turn on, did a system restore to before the graphics driver update and then rebooted again, and it worked fine. i normally just leave it on sleep overnight and this morning i was able to wake it as normal.

i thought it was fixed but again when rebooting a few minutes ago it wouldnt turn on again, and i had to go through the whole process of trying again and again before it started up.

once its in windows it seems fine, it isnt unstable and everything seems normal, but im scared to shut it down in case i cant get it to turn on again.

any ideas on what on earth is causing this?

its an i7 920 cpu and my power supply is a corsair modular i think 650w.
 
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