Have you tried picking a different channel for the TV2 output?New install, sounds works fine if put on mode 1 on both tv's, but they have to share. When put on dual, sounds goes dead on tv2. Sounds easy, but I've been troubleshooting all night????
Have you tried picking a different channel for the TV2 output?
Connect a cable from the 21-69 OUT on the receiver to a splitter and run that to your main TV and your secondary TV to verify sound that way. If no sound that way on multiple TVs, then receiver is bad. If only no sound on one TV, either that cable is bad (not usually likely in this scenario) or that TV is bad or possibly the TV is set to SAP (secondary audio program).