Troubleshooting a Power Supply Problem

If the computer does not power up when the Power Switch is pressed ON, you most likely have a malfunction in the power subsystem (loss of power at the AC outlet, faulty AC adapter, discharged Battery Packs, or faulty Power Supply on the Main Board). With a power problem, all LEDs are extinguished, the LCD screen is blank, the system does not respond when the suspend switch is pressed several times consecutively and no drive activity can be heard. The computer is unable to load software and displays no visible signs of activity. To fault isolate a power problem, check the following:

  • AC adapter and Battery - Plug in the AC adapter and double-check all connections on the adapter and computer. Ensure that the Notebook Power switch is set to the On position and that the system is not in Suspend or sleep mode.
  • Measure the voltage at the AC outlet or plug in a known good appliance (e.g. a lamp) to verify that voltage is present. If the voltage is ok, try replacing the AC adapter.
  • Check to see that the battery packs are installed correctly and that the battery charge indicators on the front of the battery packs indicate the batteries are charged (try using a new battery pack if batteries are discharged).
  • If the AC outlet voltage, AC adapter, and battery packs test normal but the computer will not power up, try disconnecting the display cable from the base (refer to Chapter 6 for disassembly instructions) then connect an external monitor to see if a short in the display assembly has occurred.
DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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