When trying to resolve this issue with Steven a while ago he asked for pictures of the psu and we ended up not sending them as the unit was working month to month and whilst annoying a 5 second job to fix. However its far less stable now (daily). I have reset it to factory defaults and its running a a scan now but noticed on the PSU the largest Capacitor has what looks like leakage around the pins, like a rusty buildup out of the capacitor. Another of the smaller ones looks like its been painted black, it looks intact it just looks so dark. If I had this kind of behavior from any of my servers or desktops I would replace the PSU.
However its not exactly an off the shelf PSU

Cheers