[zig]

Scott - I appreciate the offer and I think I'll take you up on it. I didn't have to perform root cause analysis of components but after 20 years in the Navy as a Fire Controlman isolating failures of computer, radar and electro-mechanical systems I did and still do a lot of fault isolation on just about anything that's broken. Unfortuately I have no schematics or diagrams to go off of. I'll pop it open to see if I can find anything obvious but if not I'll let you know.