d3v0

edit: uhh apparently flipping the switch on the back of the PSU 100 times back and forth will fix it

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ACHILEE5

Did it fix it?

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Quantum Reality

Have you been overclocking? If not, then I suspect a simple component failure you can get fixed under warranty. If you have been OCing warranty replacement may be more problematic but you can at least isolate the missing part.

There is one big check to make first:

Are you sure the circuit breaker or fuse for your house on that circuit has not tripped? Also, has your power bar got a fuse that kills it if the fuse has blown?

If this has happened it may not even be a computer problem at all.

Now I'll make a list for the sake of completeness:

1. Turn off the physical switch at the back of your PSU and unplug its power cord. Wait 30 sec - 1 min and then plug it back in.
2. Turn the switch back on then press your power button.
3. If this has not worked shut it all back off, re-unplug it, and then clear CMOS.
4. Once CMOS is cleared, plug it all back in and try starting up again.

If by this point it still does not fire up at all, my suggestion would be to first test that the PSU is not at fault by swapping in another PSU.

If the replacement PSU still fails to resolve the problem then I would suggest breaking your system down to the basics - video card + keyboard only should be connected so as to verify the boot stage can at least be reached. Then add one component at a time until you can reproduce the no-power-on situation.

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