Pull 'em out and send to Pacific Stereo. I think he can rebuild and test 2 of them for around $75, but double- check with him as his rates may have gone up. I think the tech on eBay(euromaster- somethin'- or- another) does them for $50 each. I have rebuilt a couple but they never seemed to work any better for me. PITA to get those little buggers opened up.......