Ensuring Sufficient Power For Your Computer; Docking Power Considerations - Dell precision m90 User Manual

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 —
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 —
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 operate the computer) 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 —
Check the AC adapter —
Connect the computer directly to an electrical outlet —
turns on.
Eliminate possible interference —
Adjust the power properties —
Reseat the memory modules —

Ensuring Sufficient Power for Your Computer

Your computer is designed to use the 130-W AC adapter; for optimum system performance, you should always use this adapter.
If you use less-powerful AC adapters, you may receive a WARNING message.

Docking Power Considerations

Due to the extra power consumption when a computer is docked to the Dell D/Dock, normal computer operation is not possible on battery power alone.
Ensure that the AC adapter is connected to your computer when the computer is docked to the Dell D/Dock.
Docking While the Computer Is Running
If a computer is connected to the Dell D/Dock or Dell D/Port while the computer is running, presence of the docking device is ignored until the AC adapter is
connected to the computer.
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Diagnostics Checklist) as you complete these checks.
When the power light is lit or blinking, the computer has power. If the power light is blinking, the computer is in standby mode—
The battery charge may be depleted.
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.
Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Check the AC adapter cable connections. If the AC adapter has a light, ensure that the light is on.
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.
See Configuring Power Management
If the computer power light turns on but the display remains blank, reinstall the memory modules. See Memory.
Contacting
Settings.
Dell.