Power Problems; Ensuring Sufficient Power For Your Computer; Docking Power Considerations - Dell Latitude D420 User Manual

If you have problems with a Dell-provided Card —
If you have problems with a Card not provided by Dell —
Power Problems
Fill out the Diagnostics Checklist (see
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
NOTE: Battery operating time (the time the battery can hold a charge) decreases over time. Depending on how often the battery is used and the
conditions under which it is used, you may need to purchase a new battery during the life of your computer.
Check the battery status light —
to an electrical outlet.
If the battery status light flashes green and orange, the battery is too hot to charge. Shut down 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 (see
Check the battery temperature —
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 —
turns on.
Eliminate possible interference —
Adjust the power properties — See
Reseat the memory modules — If the computer power light turns on but the display remains blank, reinstall the memory modules (see Memory).

Ensuring Sufficient Power for Your Computer

Your computer is designed to use a 65-W or 90-W AC adapter. However, for optimum system performance, you should always use a 90-W adapter.
Using less-powerful AC adapters will cause you to receive a WARNING message.

Docking Power Considerations

Your computer supports use of a Dell D/Port advanced port replicator. Due to the extra power consumption when a computer is docked to a docking device,
Contact Dell (see
Contact the card manufacturer.
Diagnostics Checklist) as you complete these checks.
If the battery status light flashes orange or is a steady orange, the battery charge is low or depleted. Connect the computer
If the battery temperature is below 0° C (32° F), the computer will not start up.
Bypass power protection devices, power strips, and the extension cable to verify that the computer
Turn off nearby fans, fluorescent lights, halogen lamps, or other appliances.
Configuring Power Management
Contacting Dell).
Contacting
Settings.
Dell).