Check the Prometheus' power cable very carefully. I found once that my A4000 was very unstable and I put it down to it being a dodgy Zorro backplane. However, one time messing around inside, one of the wires came out completely from the plug that attaches to the Prometheus! That is, it fell out - it didn't need persuasion. Fixing it back in correctly meant it all worked a lot smoother, so make sure all connections are good and strong.
