These things can get complex, and vary from coach to coach. I can only relate my experiences with ours.
You said you checked fuses, Teresa; our '06 Monterey uses circuit breakers in a cabinet in the bathroom over the toilet. The audio/video components, including the TV, are on the same circuit as the outlets at the dinette streetside. If something at the dinette area blew the breaker, the TV went too. So two of my questions would be if the dinette outlets have power, and is the TV the only thing out in the audio-video dept.
As to the ignition interlock, aka "ignition relay", I discovered that apparently the ice maker on our fridge plugs into an outlet box that's on the same dinette/audio/video circuit. That ice maker outlet box (behind and to the right of the fridge outside access panel alongside the fridge power outlet box) serves as a junction box of sorts, and I noticed 12 volt wiring emanating from it. I believe that is from the ignition interlock that may be mounted inside the box. It would cut out the 3 other outlets, including all A/V components and dinette, mounted downstream along the circuit from that box.
There's no guarantee yours is set up the same, especially if your fridge isn't a model with an icemaker, or that the interlock is even the problem. Just at least shut off breakers or all AC power before messing inside any outlets of course.
My schematic shows the icemaker, dinette, and A/V outlets are downstream of a main junction box supposedly under the fridge. If you have no icemaker, the interlock could be in that under-fridge box or one of the dinette ones. But as Steve alludes, one would expect to find it on any coach in the A/V front cap overhead snake pit.
To eliminate the TV itself as faulty, run an extension cord from a known good 110v outlet to the overhead, locate the TV plug either in what is probably a white plastic Belkin powerstrip or plugged directly into a regular outlet on a compartment sidewall, and plug the TV into the extension cord to see if it works. Those power strips have been known to go belly up also, or something may have leaned against its switch, turning it to the off position while traveling.
Our front TV has a small louvered vent behind it, but there is also an upholstery strip (into which the vent is mounted) at the bottom on the windshield side that's held up by about 4 screws, each hidden behind upholstery button caps. The caps just pry off, exposing the screw heads. Removing the 6" X 40" strip exposes enough of the television's back that it can be dismounted from its rack or A/V cabling refitted.
Hope some of this is helpful.
Joel
