Sound - HP Compaq Presario,Presario 8380 Supplementary Manual

Make sure that you are in the Windows desktop,
not MS-DOS. (The MS-DOS interface is a plain
screen with a prompt that looks like this: C:\>) If
you are in MS-DOS, type EXIT and press the
Enter key.
It's possible that your system has crashed. Try
rebooting your computer by pressing the On
button, waiting a few seconds, and turning the
computer back on.
Does the pointer move on the screen when you
move your mouse? If not, try this:
1
Remove the mouse ball by unscrewing the
bottom of the mouse.
2
Clean the mouse ball with a damp cloth
(not paper).
20
Getting Help
3
Use your finger to move the rollers in the
mouse ball housing.
4
Replace the mouse ball and screw on the
cover.

Sound

My computer doesn't make any sound.
Check the headphone and microphone cables at
the back of the computer to be sure they are not
switched. The colors should match. Be sure the
blue sound plug is pressed firmly into the jack.
Locate the Volume knob on the keyboard.
The knob is at the top of the keyboard, near the
center. Turn up the volume by turning the knob
clockwise. As you do this, you'll see the volume
indicator increase on your screen.