No sound from headphones, Touch pad or mouse problems, Video and display problems – Dell Inspiron 9400 User Manual
Page 106: If the display is blank
106
Troubleshooting
R
UN
THE
D
ELL
D
IAGNOSTICS
—
See "Dell Diagnostics" on page 87.
NOTE:
The volume control in some MP3 players overrides the Windows volume setting. If you have been listening
to MP3 songs, ensure that you did not turn the player volume down or off.
No Sound From Headphones
C
HECK
THE
HEADPHONE
CABLE
CONNECTION
—
Ensure that the headphone cable is securely inserted into
the headphone connector.
A
DJUST
THE
W
INDOWS
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
C
HECK
THE
TOUCH
PAD
SETTINGS
—
1 Click the Start button, click Control Panel, and then click Printers and Other Hardware.
2 Click Mouse.
3 Try adjusting the settings.
C
HECK
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.
T
O
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.
R
EINSTALL
THE
TOUCH
PAD
DRIVER
—
See "Reinstalling Drivers and Utilities" on page 108.
Video and Display Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide.
If the Display Is Blank
NOTE:
If you are using a program that requires a higher resolution than your computer supports, it is
recommended that you attach an external monitor to your computer.
C
HECK
THE
BATTERY
—
If you are using a battery to power your computer, the battery charge may be
depleted. Connect the computer to an electrical outlet using the AC adapter, and turn on the computer.
PD598a01.book Page 106 Monday, February 6, 2006 2:24 PM