Solving Problems; Power Problems; Ensuring Sufficient Power For Your Computer - Dell Latitude C840 User Manual

Solving Problems

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

Power Problems

Fill out the Diagnostics Checklist as you complete these checks.
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 —
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.
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 —
that the computer turns on.
Eliminate possible interference —
Adjust the Power Properties —
Reseat the memory modules —

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.
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
If the battery status light flashes orange or is a steady orange the battery charge is low or depleted.
Bypass power protection devices, power strips, and the extension cable to verify
Turn off nearby fans, fluorescent lights, halogen lamps, or other appliances.
See "Power Management."
If the computer power light turns on but the display remains blank,
Contact Dell.
reseat the memory modules.