This was the solution that Hugo had suggested to me. That, and heating up the negative contact (not the centre pin, but the little metal flange on the inside bottom of the adapter plug) for 10 seconds to burn away any dust that might have gotten in there (???) I haven't tried that one yet because I haven't located a soldering iron small enough to squeeze in there. I am going to give that a shot before I ship my Empeg out within the next week or two. I'll let you guys know if some miracle happens, otherwise, I'll be sending it out for service.

-Tony
MkII #554