reset the tuner but it didn't solve my lack of sound output

Similar problem with an AVR 1513. It's been this way since I opened the box (but I waited too long so Denon won't stand by their warranty). Denon tech support told me that I could reset the processor by putting the unit in "Standby" mode (turn the power off using the front button but leaving the unit plugged in) then holding the left and right tuner button while hitting the power button to start up. You need to keep holding the left and right tuner buttons for about 5 flashes of the display then you can release the tuner buttons. It reset the tuner but it didn't solve my lack of sound output. Test tone features still don't work. All configuration were properly set. Speakers still show 7.2 ohms through the wires, polarity is correct. Speakers work well when the receiver decides to work. I will scope the output to the speakers but I expect I'll see nothing. Does anyone have drawings that might help or run into this problem before?