[ReverendMaynard]

Originally Posted by Splave

maybe because my AC is on the same power strip as my monitor and PSU ??

perhaps I should try moving it to a different breakers

absolutely. Sorry I was vague, received a call when I was originally putting in an edit.

Just a quick flicker can cause that. I've had it happen during imaging outside the UPS ( I roll like that) and a minor brown out occurs.

If it happens again after you've moved from that breaker start looking at your PSU.