I have a Fender Champion 100 amp that plays when my guitar is plugged in, but if I try to change the volume, gain, or really any of the knobs the sound is not affected. It’s acting like it’s working properly (certain lights flash when I have certain settings on— those are responding). I also checked the boards and no fuses seem to be blown and no wires are frayed. Nothing seemed to trigger this change. Everything worked fine last time I played.