Sorry for the long delay in updating, was dealing with the old owner and did not want to get to deep in case they refunded my money (they did not) they did give me a matching cinema center (no charge) so not a perfect deal but I am happy, I did get the bad panel working better is now about 8 db lower than the other, took both panels in the shower and washed then rinse with distilled water, after lots of reading seems like a common problem and fix.
Thanks Jazzman and all for the links and advice. Rebuild is more than I want to attempt will probably order new panels from ML. Give me a motor with a bad valve or bad bearing or ??? will fix ya right up, esl panels look to be a lot of learning for a one time build.