vhf promlems

[the daydreamer]

went to tow a FRIENDS BOAT THAT WAS TAKING ON WATER TO THE LOCAL BOAT RAMP. SO I THOUGHT I WOULD TURN ON THE VHF TO HAIL WILDLIFE OR COAST CARD IF NESSERY. UNIT CAME ON AS NORMAL BUT NO SOUND. ITS A OLD UNIDEN MODEL. WOULD THE SPEAKER GO OUT JUST LIKE THAT? IF SO COULD IT BE REPLACED? I DON T USE IT MUCH HERE ON THE LAKE BUT IT WOULD BE NICE IF IT WORKED.