Troubleshooting 119
the sound is not muted.
D
ISCONNECT HEADPHONES FROM THE HEADPHONE CONNECTOR — Sound from the
speakers is automatically disabled when headphones are connected to the computer’s
front-panel headphone connector.
T
EST THE ELECTRICAL OUTLET — Ensure that the electrical outlet is working by
testing it with another device, such as a lamp.
E
LIMINATE POSSIBLE INTERFERENCE — Turn off nearby fans, fluorescent lights, or
halogen lamps to check for interference.
R
UN THE SPEAKER DIAGNOSTICS
REINSTALL THE SOUND DRIVER — See "Drivers" on page 127.
No sound from headphones
CHECK THE HEADPHONE CABLE CONNECTION — Ensure that the headphone cable is
securely inserted into the headphone connector (see "Left Side View" on page 25).
A
DJUST THE WINDOWS VOLUME CONTROL — Click or double-click the speaker icon
in the lower-right corner of your screen. Ensure that the volume is turned up and that
the sound is not muted.
Touch Pad or Mouse Problems
CHECK THE TOUCH PAD SETTINGS —
1
Click
Start
→
Control Panel
→
Printers and Other Hardware
→
Mouse
.
2
Try adjusting the settings.
CHECK THE MOUSE CABLE — Shut down the computer. Disconnect the mouse cable,
check it for damage, and firmly reconnect the cable.
If you are using a mouse extension cable, disconnect it and connect the
mouse directly to the computer.
TO VERIFY THAT THE PROBLEM IS WITH THE MOUSE, CHECK THE TOUCH PAD —
1
Shut down the computer.
2
Disconnect the mouse.
3
Turn on the computer.
4
At the Windows
desktop, use the touch pad to move the cursor around,
select an icon, and open it.
If the touch pad operates correctly, the mouse may be defective.
CHECK THE SYSTEM SETUP PROGRAM SETTINGS — Verify that the system setup
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