Dell M2400 Service Manual - Page 15

Video and Display Problems - graphics card

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Disconnect headphones from the headphone connector - Sound from the speakers is automatically disabled when headphones are connected to the computer's front-panel headphone connector. Eliminate possible interference - Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference. Run the Hardware Troubleshooter - See Hardware Troubleshooter. 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 Quick Reference 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. 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 Diagnostic Lights. 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 Settings. → Control Panel→ Hardware and Sound→ Personalization→ Display

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Disconnect headphones from the headphone connector —
Sound from the speakers is
automatically disabled when headphones are connected to the computer's front-panel headphone
connector.
Eliminate possible interference —
Turn off nearby fans, fluorescent lights, or halogen lamps to
check for interference.
Run the Hardware Troubleshooter —
See
Hardware Troubleshooter
.
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 Quick Reference 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.
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
Diagnostic Lights
.
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
.