Standard omni marine radio

[duckmnn]

I know it's older,but it has always worked good for us.Yesterday went on trip and tried using radio. neither channel button will raise or lower channel,nor the turn knob does either.Everything else works ,transmit and receives .It was last on 16 monitoring CG fireworks.Is it junk know or is there a reset? I've turned power of and on no help. Or is the screened locked.