Dell Latitude C840 User Manual Page 81
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- Table of contents
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Solving Problems
Power Problems
Fill out the Diagnostics Checklist as you complete these checks.
Ensuring Sufficient Power for Your Computer
Your computer's Intel®Pentium®4 microprocessor requires more power than the microprocessors used in Dell's previous portable computers. Your computer
is designed to use the 90-W AC adapter and the 4400-mAh battery that shipped with it; for optimum system performance, you should always use these
components.
Power Problems
Error Messages
Video and Display Problems
Sound and Speaker Problems
Printer Problems
Modem and Internet Connection Problems
Touch Pad or Mouse Problems
External Keyboard Problems
Unexpected Characters
PC Card Problems
Drive Problems
Network Problems
General Program Problems
Resolving Software and Hardware Incompatibilities
If Your Computer Gets Wet
If You Drop or Damage Your Computer
Check the power light — When the power light is lit or blinking, the computer has power. If the power light is blinking, the computer is in
standby mode—press the power button to exit standby mode. If the light is off, press the power button to turn on the computer.
Charge the battery — The battery charge may be depleted.
1. Reinstall the battery.
2. Use the AC adapter to connect the computer to an electrical outlet.
3. Turn on the computer.
Check the battery status light — If the battery status light flashes orange or is a steady orange the battery charge is low or depleted.
Connect the computer to an electrical outlet.
If the battery status light flashes green and orange, the battery is too hot to charge. Turn off the computer, disconnect the computer from
the electrical outlet, and then let the battery and computer cool to room temperature.
If the battery status light rapidly flashes orange, the battery may be defective. Contact Dell.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Check the AC adapter — Check the AC adapter cable connections. If the AC adapter has a light, ensure that the light is on.
Connect the computer directly to an electrical outlet — Bypass power protection devices, power strips, and the extension cable to verify
that the computer turns on.
Eliminate possible interference — Turn off nearby fans, fluorescent lights, halogen lamps, or other appliances.
Adjust the Power Properties — See "Power Management."
Reseat the memory modules — If the computer power light turns on but the display remains blank, reseat the memory modules.
- Notes, Notices, and Cautions 1
- Abbreviations and Acronyms 1
- About Your Computer 2
- Left Side View 5
- Right Side View 7
- Back View 8
- Bottom View 10
- Appendix 12
- FCC Notices (U.S. Only) 13
- Modem Regulatory Information 14
- Fax Branding 14
- IC Notice (Canada Only) 15
- CE Notice (European Union) 15
- CE Mark Notice 16
- New Zealand Telecom Warnings 16
- ENERGY STAR®Compliance 17
- VCCI Notice (Japan Only) 18
- Class A Device 19
- Class B Device 19
- BSMI Notice (Taiwan Only) 21
- Warranty and Return Policy 22
- Using a Battery 23
- Charging the Battery 24
- Removing a Battery 24
- Installing a Battery 25
- Storing a Battery 25
- Cleaning Your Computer 26
- Using Dell Diagnostics 28
- Advanced Testing 29
- Advanced Testing Help Menu 30
- Using the Display 32
- Reinstalling Software 34
- Using the Microsoft 35
- Windows 35
- XP Device Driver Rollback 35
- Using System Restore 35
- Creating a Restore Point 36
- Finding Information 38
- Fixing Problems 39
- Installing Parts 39
- Getting Help 40
- Problems With Your Order 41
- Product Information 41
- Before You Call 42
- Contacting Dell 42
- Glossary 51
- Dell™AccessDirect™Button 63
- Numeric Keypad 63
- Keyboard Shortcuts 64
- Touch Pad 65
- Track Stick 66
- Using the Module Bay 68
- Using the CD or DVD Tray 69
- Adjusting the Volume 69
- Passwords 71
- Using a Hard Drive Password 72
- Assigning an Asset Tag 72
- Deleting an Asset Tag Number 73
- Assigning an Owner Tag 73
- Deleting an Owner Tag 73
- Asset Tag Options 73
- Using PC Cards 75
- Removing a PC Card or Blank 76
- Power Management 78
- Power Options Properties 79
- Advanced Tab 80
- Hibernate Tab 80
- Intel SpeedStep®Tab 80
- Solving Problems 81
- Error Messages 82
- Video and Display Problems 85
- Sound and Speaker Problems 86
- Printer Problems 87
- Touch Pad or Mouse Problems 89
- External Keyboard Problems 90
- Unexpected Characters 90
- PC Card Problems 91
- Drive Problems 91
- Network Problems 93
- General Program Problems 93
- Error messages appear 94
- Windows XP 94
- A program stops responding 94
- A solid blue screen appears 94
- If Your Computer Gets Wet 95
- Adding and Replacing Parts 97
- Adding a Mini PCI Card 98
- Replacing the Hard Drive 100
- S-Video and Standard Audio 101
- S-Video and Digital Audio 102
- NVIDIA Video Controller 106
- Overview 108
- System Setup Screens 108
- Commonly Used Options 109
- Specifications 111
- Identifying Your Computer 115
- Packing the Computer 115
- Travel Tips 115
- Traveling by Air 116
- Help and Support Center 117
- Switching to Classic View 117
- Desktop Cleanup Wizard 117
- Program Compatibility Wizard 118
- Internet Connection Firewall 118
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