OK - neighbor's son #3 is kinda dumb to have done this, but he laid his amp on it's back to send the sound 'up' whatever that was for or reason why is unknown to me.
It took this abuse for a few hours I guess when all of a sudden it went mute.
Obviously, out of any warranty considerations
NOW!
Question - what is the USUAL component that dies when an amp is denied cool air? I know this is kinda vague and not very well-diagnosed, but I need someplace to start.
Right now it just lights up the power jewel and that's about it. When I hit the pedal, the OD LED comes on, so there's at least the electronic switching happening, but that's about it.
No pot crackle or hum or on/off click - nuthin'.
Oh - it's a Crate PW120 (guitar) combo amp, doesn't have a fan in it that I can see, 60 Watts and has 2-12s + Spring Reverb and a dial-full of effects. Nice amp and I can get it for free if I feel I can fix it.

I know it says it has DSP for the reverb, but I played it once and if you shook the cab, the reverb made a lot of 'spring-noise' like my old Fender D/R of many years ago!