Adjusting System Warning Beep Volume - Compaq Armada 7800 Reference Manual

Adjusting System Warning Beep Volume

Press the Fn+F5 hotkeys to adjust the system warning beep
volume.
To increase volume, press the right arrow key.
To decrease volume, press the left arrow key.
(The arrows in this illustration indicate the increase or decrease in
volume levels.)
Using the Keyboard and Pointing Device 3-7