Hi Pete,
I would say the problem is most likely with
your PSU; they're somewhat known for
problems. Also, I know this may sound
obvious, but I had a similar problem once
and it turned out that the PSU connector
needed a little extra shove into the
socket on the back of the machine.
You could also check your output ratings
with a meter I suppose...but a proper
voltage reading may not always ensure the
condition of the PSU, i.e it may fail
under a certain amount of load...you
could try it without the accelerator,
if it works then it's probably the PSU.
