I have a B & K AVR 507 Series 2 unit and one of the power supplies has gone bad. Since B & K is no longer around, parts are not available. Any suggestions for what to do with this unit as for as repair or use in conjunction with other amplifiers, or is it time to move on. The unit was set up to power 5 speakers in theater setting and 2 speakers for stereo listening in a separate room.
