Dell Latitude C640 User Manual Page 63
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- Table of contents
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Adjust the brightness - See "Adjusting Brightness" for instructions on adjusting the
brightness.
Move the subwoofer away from the computer or monitor - If your external speaker
system includes a subwoofer, ensure that the subwoofer is at least 60 cm (2 ft) away from the
computer or external monitor.
Eliminate possible interference - Turn off nearby fans, fluorescent lights, halogen lamps, or
other appliances.
Rotate the computer to face a different direction - Eliminate sunlight glare, which can
cause poor picture quality.
Adjust the Windows display settings
Windows XP
Click the Start button and then click Control Panel.1.
Click 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.4.
Windows 2000
Click the Start button, point to Settings, and then click Control Panel.1.
Double-click the Display icon and then click the Settings tab.2.
Try different settings for Colors, Screen area, and Advanced Settings.3.
Run the Video diagnostics tests - If no error message appears and you still have a display
problem, but the display is not completely blank, run the Video device group in the Dell
Diagnostics. Then contact Dell.
See "Error Messages" - If an error message appears, see "Error Messages."
If only part of the display is readable
Connect an external monitor
Turn off your computer and connect an external monitor to the computer.1.
Turn on the computer and the monitor and adjust the monitor brightness and contrast
controls.
2.
If the external monitor works, the computer display or video controller may be defective.
Contact Dell.
Sound and Speaker Problems
- Notes, Notices, and Cautions 1
- Abbreviations and Acronyms 1
- Finding Information 2
- Using Devices 3
- Fixing Problems 3
- Installing Parts 4
- About Your Computer 5
- Dell AccessDirect™ Button 8
- Left Side View 9
- Right Side View 10
- Back View 13
- Bottom View 17
- About Microsoft® Windows® XP 18
- Desktop Cleanup Wizard 19
- Program Compatibility Wizard 20
- Internet Connection Firewall 21
- Dell™ AccessDirect™ Button 22
- Numeric Keypad 23
- Keyboard Shortcuts 23
- System Functions 24
- Display Functions 24
- Power Management 24
- Speaker Functions 24
- Touch Pad 25
- Track Stick 26
- Changing the Track Stick Cap 28
- Using the Module Bay 29
- In Microsoft® Windows® XP 30
- In Windows 2000 30
- Using the CD or DVD Tray 31
- Adjusting the Volume 32
- Adjusting the Picture 32
- Using a Battery 34
- Checking the Battery Charge 35
- Charging the Battery 36
- Removing a Battery 37
- Installing a Battery 37
- Storing a Battery 38
- Power Options Properties 40
- In Windows XP 41
- Power Schemes Tab 41
- Alarms Tab 41
- Power Meter Tab 42
- Advanced Tab 42
- Hibernate Tab 42
- Intel SpeedStep® Tab 42
- Using PC Cards 44
- Installing a PC Card 45
- Removing a PC Card or Blank 46
- Traveling With Your Computer 47
- Travel Tips 48
- Passwords 50
- Using a Hard Drive Password 51
- Assigning an Asset Tag 52
- Deleting an Asset Tag Number 53
- Assigning an Owner Tag 53
- Deleting an Owner Tag 54
- Asset Tag Options 54
- Solving Problems 55
- Docking Power Considerations 56
- Error Messages 57
- Video and Display Problems 61
- Sound and Speaker Problems 63
- Printer Problems 65
- Touch Pad or Mouse Problems 67
- External Keyboard Problems 68
- Unexpected Characters 69
- Drive Problems 69
- PC Card Problems 72
- Network Problems 73
- General Program Problems 73
- If Your Computer Gets Wet 74
- Using the Display 77
- Dual Independent Display Mode 78
- Using the Dell Diagnostics 81
- Starting the Dell Diagnostics 82
- Advanced Testing 83
- Advanced Testing Main Screen 84
- Advanced Testing Help Menu 84
- Cleaning Your Computer 87
- Floppy Drive 88
- CD, CD-RW, and DVD Drives 88
- Reinstalling Software 89
- Windows XP 91
- Windows 2000 92
- Creating a Restore Point 94
- Adding and Replacing Parts 96
- Adding a Mini PCI Card 98
- Replacing the Hard Drive 100
- Adding a Modem 102
- S-Video Connection 104
- Composite Video Connection 106
- ATI Video Controller 109
- Overview 112
- System Setup Screens 113
- Commonly Used Options 113
- Performing a One-Time Boot 114
- Changing Printer Modes 115
- Changing COM Ports 115
- Enabling the Infrared Sensor 115
- Specifications 117
- Getting Help 123
- AutoTech Service 124
- Problems With Your Order 125
- Product Information 125
- Before You Call 126
- Contacting Dell 127
- Appendix 141
- FCC Notices (U.S. Only) 142
- Modem Regulatory Information 143
- IC Notice (Canada Only) 144
- CE Notice (European Union) 145
- CE Mark Notice 146
- New Zealand Telecom Warnings 147
- ENERGY STAR® Compliance 148
- VCCI Notice (Japan Only) 149
- Class A ITE 150
- Class B ITE 150
- Class A Device 151
- Class B Device 152
- BSMI Notice (Taiwan Only) 154
- NOM Information (Mexico Only) 155
- Macrovision Product Notice 156
- Warranty and Return Policy 156
- Glossary 157
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