I have a Pioneer 52TX. My problem is that it sounds great when I play a DVD (all speakers work) but when I watch TV I can only get sound out of the right front speaker. The other 4.1 just produce some humming. I have read the manual cover to cover twice with no luck diagnosing the problem. The best luck I have had is when I switch it to 7 ch. Stereo I get sound out of the right rear as well. Can anyone help???