There are many causes of this problem. It is possible that the output trnasistors are open on that channel. This is a problem that is not easly to diagnose without test equipment and some knowledge of electronics. I'll look up that model and try to provide additional hints.
There are many causes of this problem. It is possible that the output trnasistors are open on that channel. This is a problem that is not easly to diagnose without test equipment and some knowledge of electronics. I'll look up that model and try to provide additional hints.
Dan