• The computer does not receive power (no noise or lights)

    If there is no noise from the computer fans, the lights on the computer do not illuminate, and the screen is black, use the following steps to resolve the issue.
    1. Verify the computer is receiving power from the AC adapter.
      Verify that the AC adapter is not damaged and is connected correctly to a working wall outlet plug. Verify AC power is connected to the system board by examining the AC adapter, wiring, and pin connection for damage. The keyboard LEDs will glow when AC power is connected to the system board.
      Damaged components, like the AC adapter or the pin in the power connector, may require an HP-certified repair.
    2. Use a different AC power adapter.
      If you have access to a different AC adapter or power pack that is designed for the computer, connect it to the notebook and try to start the computer. If you own or have access to more than one notebook, verify that you are using the adapter which belongs to the notebook.
       CAUTION:
      Using a power adapter that does not meet the power requirements or has the wrong type of connector may damage the computer. On newer notebook models, connecting the wrong adapter to the notebook may cause the power LED lights to blink but not power the computer.
    3. Remove the battery and boot on AC power only.
      A discharged or defective battery may prevent the AC adapter from supplying enough power to start the computer. To verify that power from the AC adapter is available for computer; remove the battery, connect AC power adapter, and press the Power button. If available, try using a different AC adapter (one that is rated for the computer) and repeat this test.
      • If LEDS do not glow and the fan or hard drive do not spin, AC adapter may need to be replaced.
      • If LEDs glow and computer boots, the battery may need to be replaced.
      • If LEDs glow but computer does not boot, refer to the Computer Starts but Screen Remains Blank document.
    4. Remove the AC adapter and boot on battery power only.
      A defective AC adapter may not charge the battery and prevent the computer from booting on battery power only. To verify battery power available for the computer; connect AC power adapter, allow battery to charge for 30 minutes or more, disconnect the power adapter and press the Power button. If available, try using a fully charged battery, of the same type, from another computer and repeat this test.
      • If LEDS do not glow and the fan or hard drive do not spin, battery may need to be replaced.
      • If tests of both the battery and the AC adapter fail, there may be a problem with system board requiring service by HP.
      • If LEDs glow and computer boots, the AC adapter may need to be replaced.
      • If LEDs glow, but computer does not boot, refer to the Computer Starts but Screen Remains Blank document.
    5. Check the AC adapter to make sure that it is plugged into the computer and the power outlet. Also check the adapter for signs of wear or damage. Replace a damaged adapter.
    6. Plug the adapter into a different power outlet and try to turn on the computer.
    7. If you have another AC adapter, plug it into the computer and the outlet and try to turn on the computer.
    8. If these steps do not resolve the issue, refer to the Troubleshooting No LED Lights Glow During Startup or Boot document.
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