Definately not the magnet. I've heard of this one, lemme have a think...
---------- Post added at 15:44 ---------- Previous post was at 15:31 ----------
Thinking about it it was probably a surge when the power went off or on. It's worth powering your gear through a surge protector . Try replacing transistors Q2 and Q3. If that doesn't work then replace IC101 (or was it 301?). The same thing happens if you get a short on the target light circuit, which is a common fault when people do a poor job of modding their decks.
a bit off topic but is it bad that I turn off all my kit by one switch on the wall, not each one individually?
Thanks DTR Ill try that