Avionics (Radio Problem) Narrowed Down... I Think???

Thanks! I will do that...

Off topic question:

The audio panel from the front, has every indication that it has marker
beacons (O, M, I indicators), but there's nothing there... Simply no
led's or wires to the panel. This would seem like a fairly simple
thing to implement??? Should I just cut my losses and be happy I can
communicate, or am I getting greedy, thinking I could go to Radio Shack
and with minimal effort, upgrade this existing audio panel by myself?

If you think it's not worth the effort, I'll close this thread and open
a new one on how to repack and seal the front nose strut, or how to
find the source for fuel in the cabin smell after topping the tanks, or
tip tanks... Keep em' full or not??? :-))

Thanks!
Todd