I am brand spanking new to these pagers and am just learning how to program them. I have a G4 pager that somehow is now muted. The only way to listen to any talkgroup is to hold the reset button for push to listen. Push to listen is turned off, I have tones turned on for all of the channels, it shows that I am on duty. I am not familiar w/ the programming side, but I had someone who is look into it and they advised that all settings are as they should be for our county. There is a small mute icon that appears at the bottom right corner of the screen whenever one of my units keys up. I have not changed any of the settings on the pager, it was given to a trainee who returned it stating that they touched nothing, that it was muted since she received it. Does anyone have any ideas as to what caused this and how to fix it?