Dell XPS 420 (Late 2007) - Manual (Page 73)

Troubleshooting
73
No sound from headphones
C HECK THE HEADPHONE CABLE CONNECTION — Ensure that the headphone cable is
securely inserted into the headphone connector (see "Front and Back View of the
Computer" on page 15).
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.
Video and Monitor Problems
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide.
NOTICE:
If your computer came with a PCI graphics card installed, removal of the
card is not necessary when installing additional graphics cards; however, the card
is required for troubleshooting purposes. If you remove the card, store it in a safe
and secure location. For information about your graphics card, go to
support.dell.com.
The screen is blank
NOTE:
For troubleshooting procedures, see the monitor’s documentation.
The screen is difficult to read
C HECK THE MONITOR CABLE CONNECTION —
• Ensure that the monitor cable is connected to the correct graphics card (for dual
graphics card configurations).
• If you are using the optional DVI-to-VGA adapter, ensure that the adapter is
correctly attached to the graphics card and monitor.
• Ensure that the monitor cable is connected as shown on the setup diagram for your
computer.
• Remove any video extension cables and connect the monitor directly to the computer.
• Swap the computer and monitor power cables to determine if the monitor’s power
cable is defective.
• Check the connectors for bent or broken pins (it is normal for monitor cable
connectors to have missing pins).
book.book Page 73 Tuesday, November 27, 2007 10:29 AM