Umm..... another situation is here.
One channel(R-) of my beta22 has some problem.
When I turn on the amp, the beta22 capacitors begin to charge, or at least it sounds like, I can hear music from it. After fully charged, like few seconds, it is dead silent! I tested the output pad and it is 0 volt relative to ground. But when I turn off the amp, the caps begin to discharge, the music is back again till fully discharged. Everything else seems fine, and the channel used to be normal, so I am really lost.
Also one thing bothers me is that other two channels (L-, R+)with some hum noise, but after warm up it become quieter, since the L+ and R- is free from hum so I don't think this is normal.
Thanks in advance.