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RUN THE HARDWARE TROUBLESHOOTER — See
No Sound From Headphones
CHECK THE HEADPHONE CABLE CONNECTION — Ensure that the headphone cable is securely
inserted into the headphone connector. See the Setup and Features Information Guide for your
computer at support.dell.com.
ADJUST 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.
6.2.8
Video and Display Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
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.
CHECK THE DIAGNOSTIC LIGHTS — See
CHECK THE DISPLAY SETTINGS — See the Dell™ Technology Guide on your computer or at
support.dell.com.
ADJUST THE WINDOWS DISPLAY SETTINGS —
Windows XP:
1. Click Start→ Control Panel→ Appearance and Themes.
2. Click the area you want to change or click the Display icon.
3. Try different settings for Color quality and Screen resolution.
Windows Vista:
1. Click Start
→ Control Panel→ Hardware and Sound→ Personalization→ Display
Settings.
2. Adjust Resolution and Colors settings, as needed.
Only Part of the Display is Readable
CONNECT AN EXTERNAL MONITOR —
1. Shut down your computer and connect an external monitor to the computer.
2. Turn on the computer and the monitor and adjust the monitor brightness and contrast
controls.
If the external monitor works, the computer display or video controller may be defective. Contact Dell
Support.
6.3 Dell Technical Update Service
The Dell Technical Update service provides proactive e-mail notification of software and hardware
updates for your computer. The service is free and can be customized for content, format, and how
frequently you receive notifications.
To enroll for the Dell Technical Update service, go to support.dell.com.
Page 83 of 94
™
Dell
Latitude™ XT2 XFR Service Manual
Hardware
Diagnostic
Troubleshooter.
Lights.
Version A00-01
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