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HP Notebook PCs - Troubleshooting No LED Lights Glow During Startup or Boot
There are many reasons that a computer does not startup or boot into the Windows operating system. If your computer will not start or boot, you will see or hear symptom to indicate the general area of the problem. If you are not sure what the problem is, see Overview of How to Troubleshoot Problems When a Computer Does Not Start Up or Boot Properly .
Startup Symptom: LED lights do not glow, display is black, computer does not start
Use this document if the notebook does not start, none of the LEDs glow, there are no beeping sounds, no operating sounds such as fan noise or the hard drive spinning, and there are no other indications of power to the computer when the notebook power button is pressed.
The cause of this no power problem may be a failed AC adapter or power cord, a discharged or damaged battery, or a failed notebook system board component. Damaged components may require an HP certified repair. You can use this document to identify the cause of the startup no boot problem.
DO THIS FIRST - Perform a hard reset
If a PC suddenly fails to boot properly, you should perform a hard reset as the first procedure.
When the AC adapter is connected, the power LED, located near the power icon (displayed as a lightening bolt on most PCs)
Common actions to resolve no power issues
If the computer does not start, the LED lights do not glow, and the display is black, you can perform one or more of the following actions to resolve the no power issue.
Examine the adapter and power cord for physical damage
If the cords, connectors, or the power adapter are damaged, contact HP to order a new AC power adapter.
Test the power from the AC wall outlet to the notebook connector
If none of the LEDs glow when the AC adapter is connected to the computer, follow the steps below to determine whether the problem is related to the AC adapter or may indicate a problem with system board. The battery should be removed from the notebook because the following actions are designed to test the AC power supply.
Do one or more of the following actions, then press the Power button and look for glowing LEDs or listen for sound of a fan spinning.
If the LEDs do not glow, continue with the following actions to start the computer on battery power only.
Start computer using the battery only
If a battery is defective and does not accept a full charge from an AC adapter, it may prevent the computer from booting on battery power only. Also, if the AC adapter is defective, it may not charge the battery properly. To verify battery power available for the PC; with the computer turned off, connect the AC power adapter and allow the battery to charge for 30 minutes or more. Then, assuming the battery is charged, disconnect the power adapter and press the power button.
Contact HP to order a new battery.
Check that the lid switch moves freely
Some notebooks have an external switch, located near the hinge. This switch turns off the monitor when the lid is closed. It can also be programmed to shut down the computer when the lid is closed. To test the lid switch, open and close the lid several times, or press and release the switch to verify it is not stuck in the down position.
What you can do if the computer still does not startup or boot properly
When you have completed the troubleshooting steps covered in this document, there should be power available to computer. When you press the power button, the LEDs should glow, and you should hear the sounds of the fan and the hard drive spinning.
What to do when the computer starts into Windows normally
After you have completed the troubleshooting process and your computer has booted normally into the Windows operating system, you should:
For detailed information on this topic, see HP Notebook PCs - Update Your Computer After Troubleshooting a Problem .