Back to the TV / Radio switch , some Monacos have this sw so you can
play the TV or the dash radio thru the same surround sound speakers .
The switching is actually done thru a switching device made by RiverPark , in my
coach it is mounted in the overhead cabinet to the left of driver .
It is cigar box sized and my sw is down and to the right of my radio but some have
found the sw elsewhere .
Does your dash radio play ? If it does then try flipping switches to see if one
will cut off the sound , if you find one it could be the problem .
Things don't seem to operate very well when trying to marry the old technology
to the new stuff but you should be able to get some audio .
I was in Costco recently and saw a small Bose sound bar that sounded amazingly
good .
Most sound bars are to wide to fit under my center mounted tv but this one
is only 21.5 in wide .
A sound bar could be a quick & easy fix for better sound .
Here's a link to it but at Amazon .
https://www.amazon.com/Bose-732522-1...bose+sound+bar
Ray