Did you have any leaking capacitor damage to yours? Both of mine are suffering from it, with one still not working after my second time inside. The next time I go in there, I am going to compare the working one with the non working one as I go. Then I will test it out before closing things up. Its amazing how much damage those caps did to the circuit board traces. I rebuilt the worst one, but I suspect I missed something in the process. I never thought to look at the serial number on the circuit board. I'll do that next time I'm at it. I have a few other things to move out before I can get to the Kefs.