Subject: STB TS for no audio on some channels due to Dolby 5.1 turned on.
Verizon STB box trouble shooting procedure to access the hidden menu.
Select TV input on monitor or TV (not HDMI).
Hit the STB button on the remote to make sure the STB is off. Hit the OK button and then the Menu button.
To get to the audio adjustment, arrow down to Addition HDMI setting hit OK.
Next screen change Audio output from Auto to L PCM using the OK button
Hit the STB button to exit.