My computer, which I just bought in March, just turned off, as if I'd pulled the plug. I thought maybe it might have been a power surge but everything else connected to the same power bar didn't short and is working correctly. I push the power button and nothing comes on.
I can only deduce that it might be the PSU. I've tried removing the battery on the MOBO and resetting it with no luck (there isn't even the reserve power light on the MOBO).
Any ideas of what exactly could have caused this?