No Sound From Headphones; Touch Pad Or Mouse Problems; Video And Display Problems; If The Display Is Blank - Dell PP21L Owner's Manual

No sound from headphones

C H E C K T H E H E A D P H O N E C A B L E C O N N E C T I O N
the headphone connector. See "audio connectors" on page 15.
A D J U S T T H E W I N D O W S V O L U M E C O N T R O L
corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

Touch Pad or Mouse Problems

C H E C K T H E T O U C H P A D S E T T I N G S
1 Click the Start button, click Control Panel, and then click Printers and Other Hardware.
2 Click Mouse.
3 Try adjusting the settings.
H E C K T H E M O U S E C A B L E
C
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 V E R I F Y T H A T T H E P R O B L E M I S W I T H T H E M O U S E
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 E I N S T A L L T H E T O U C H P A D D R I V E R

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 H E C K T H E B A T T E R Y —
depleted. Connect the computer to an electrical outlet using the AC adapter, and turn on the computer.
T E S T T H E E L E C T R I C A L O U T L E T
device, such as a lamp.
C H E C K T H E A C A D A P T E R
that the light is on.
—
Click or double-click the speaker icon in the lower-right
—
—
Shut down the computer. Disconnect the mouse cable, check it for damage,
—
See "Reinstalling Drivers and Utilities" on page 75.
—
If you are using a battery to power your computer, the battery charge may be
Ensure that the electrical outlet is working by testing it with another
—
Check the AC adapter cable connections. If the AC adapter has a light, ensure
—
Ensure that the headphone cable is securely inserted into
, C H E C K T H E T O U C H P A D —
Solving Problems
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