Techie question

Hello all! We've got a computer that's just started switching itself off for no apparent reason - it seems like there's something wrong with the power supply as far as I can tell. Is this a common symptom of a worn-out PSU? And if not, what else might it be? (I'm sure it's not the external power supply equipment, as the monitor doesn't go off.

(no subject)

I like poker sometimes. I called an cheap all-in raise with AQ suited against KT. The table came QAAAQ. Think I won that one...