Ok, the next thing would be to heat the PCB with a hairdryer until the fault shows up, then use a can of freezer to isolate the faulty component. Cool each suspected part one at a time. When the fault clears you have your answer
Colin, December 2007
checked all the joints and they are all ok as far as i can tell..?
chris wright, December 2007
You need to check around the preamp driver transistor(s) and coupling capacitors. You'll probably find a dry joint in that area.
