Fender Super Champ XD No sound or Ch. Light

[KCman]

Amp was brought in with no sound and no ch select ligfht working. When I first checked it, the power light came on and the input selector did not turn the ch. light on. I see the input is going to 'Mute' on the DSP, so I plugged in a cable and the ch. select worked and sound came on.
I then unplugged the cable and the amp worked. Later, It was off again until I plugged in a cable to the input again. Might be coincidence, but would the DSP Mute have anything to do with the Ch Select not lighting? I know the selecting goes to the DSP as well.

I don't have a footswitch for it, but TP10 and TP11 are good for the FX on, even with the sound off.

Thanks