I had a run of QHY9 problems around the time I started running my rig from inside. That is, a few small power supplies into a power board back to 240V outside and the lappy plugged in to 240V inside. Outside rig run by USB extender lead from laptop. Theo thinks it was more likely moisture issues that have since been sorted.
Anyway, since then I've religously run a separate USB lead from CCD to laptop and run the CCD along off a battery. I like to think I'm a scientist, but heck there's probably superstition in here. Thus my questions - curious to learn more about the power supply issues......
http://www.reactiongifs.com/wp-conte...ostbusters.gif
p.s. David - I wouldn't be worried if everything including lappy was off the same supply somehow, or powered off same battery bank as you probably would do at Leyburn.