I just bought 2 MC2505's from eBay for what I thought was a good deal knowing they both had problems. Both amps have the same problem with one completely dead channel, no hum no noise just dead silence. Both meters do show signal at the same level. I have only cleaned the controls so far and have read the service manual and saw the meter circuit comes just before the autoformer and I am wondering is it possible to have a bad autoformer or could both speaker switches be bad. Thanks in advance.