If you don't mind sending your amp off for repair, Db-r.com does awesome repairs. He'll (Chris) repair almost anything but does have a "few" that he doesn't touch so check out his site for specifics...His prices are reasonable too!
he does good work there.. you'd have to ship it to texas though //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif