Denon AVR-785 Receiver "fl 4" Questions

...AT THIS,USE THE TEST TONE AND YOUR EARS . RULL OF THUMB SET FL,FR,CEN AT ZERO REARS +4 SUB AT 0. TUNE RADIO 2 STATION THEN PRESS AND HOLD PRESET NUMBER TO LOCK IN I THINK! HOPE THIS HELPS. CABLE

...FL, LR, RL, RR, SUB, CENTER ) If you can ( one at a time ) turn off the SUB, Center, Fronts and Rears: trying to re-create the failure each time while you have one part of your system disabled or ...

...FL and FR... I have reset the unit and read the manual for bit and still no luck. I have had the receiver for over a year now and I have had the surround sound working with just 4 speakers before. ...