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My PC will not boot just starts fan and shuts down

  • Boot
  • Graphics Cards
  • Fan
  • Components
Last response: in Components
a b U Graphics card
October 19, 2010 7:13:56 PM

It starts the fans then shuts down then starts the fans and shuts down in a loop have tried another video card but it continued to do the same

More about : boot starts fan shuts

a c 75 U Graphics card
October 19, 2010 10:59:15 PM

Is this a new build? Or was it working before, and suddenly stopped working?

If replacing the video card didn't solve the issue, I'd start looking at RAM & CPU next. If you have multiple sticks/dimms of RAM, I'd try taking some out. Possibly try turning it on with only a single stick of RAM in it. Then try the other stick.

If that doesn't work, it could be a faulty CPU or motherboard.
a b U Graphics card
October 20, 2010 12:17:54 AM

If this is a new build, or possibly even if it's an old build, you might want to check if the heatsink is seated and secured properly. If it's a new build you'll also want to check to make sure that if there was a protective plastic film over the contact surface of the heatsink, you removed it before securing it.

It certainly sounds as if it could be heat related, thus the advice.
a b U Graphics card
October 20, 2010 12:34:20 AM

If you have checked that the CPU is not overheating then the cause of this is almost certainly a faulty power supply and is the first thing that should be tried.