[OT] PC powering off

[Greg Keogh]

Folks, my 5 month old hand-built PC has developed a serious problem where
it randomly just switches itself off, no warning, just instant off. It
happened twice earlier in the year, which I wrote off as flukes. Now it's
happening a few times a day. Pressing power on does nothing. If I pull all
the plugs out of the back and wait 5 to 15 minutes and put everything back
in, then it powers up again. Any ideas? Power supply? -- *GK*