Dell Latitude C840 User Guide - Page 81

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 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 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 - 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. 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.