Mute Button Turning On An Off Randomly


hi again,

i have 10.4, a dual processor1.8 g5. i have an apple hard wired keyboard and a logitech mouse wireless mouse.

about one week ago the mute button on my sound menu started turning the speaker on and off. the result is that all day long the little speaker icon comes on, makes a beep, and then goes away.

it's like i have a computer with ADD. i've rebooted several times which seems to alleviate the problem for a short period. then it starts all over again.

i turned off bluetooth in case the computer was receiving a stray signal somewhere.

any ideas?

thanks in advance.

-andy clayman