Question about HP Pavilion dv9000z Notebook

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Why won;t my laptop power up

Why won't my hp laptop power up. somtimes it turns on then off. sometimes the power stays on for a while, but the screen is black. what is wrong?

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This issue could be due to presence of static charges or internal hardware malfunction of the notebook. To isolate the exact cause of the issue, perform the following steps.

Step 1: Hard Reset

To perform a hard reset, please follow the steps listed below:

1. Unplug the AC adapter from the notebook PC and remove from any port replicator or docking station.
2. Remove the battery from the notebook battery compartment.
3. Press and hold down the power button for about 20 seconds.
4. Insert the battery and plug the AC adapter back into the notebook PC.
5. Press the power button to turn the notebook PC back on.

This will discharge the static charges from the notebook. Now check if the notebook works fine or not. However, if the notebook turns on and if the display stays blank then connect an external monitor to the notebook and check for the display on it.

Step 2: External Monitor

You can follow the steps below to connect an external monitor to the notebook.

1. Turn off the notebook.
2. Connect the monitor cable from the external monitor to the monitor port on the rear/side of the computer.
3. Connect the monitor to a power source and turn it on.
4. Press the Power button to turn on the computer.

At this time, please follow the instructions mentioned below for switching the display to the external monitor:

The notebook's video card supports three modes. Built-in screen only; external video only; and both on simultaneously (mirrored). If you're not seeing the image on the desired device(s), the notebook's video card is probably in another mode. Press FN + F4 to cycle through the display options: Notebook display, External monitor, both.

If you press FN + F4 once, the external monitor will display & there will be no Notebook LCD display.
If you press FN + F4 twice, the external monitor will display & there will be some shading on the Notebook LCD.
If you press FN + F4 thrice, both Notebook LCD & external monitor will display.

If the issue persists on the external monitor, then this could be due to defective video card on the notebook. However, if the display on the external monitor is fine, then the issue is with the LCD display panel of the notebook.
Incase, if the notebook does not turn on at all then the issue is due to internal hardware malfunction. In all the cases, the notebook requires a detailed onsite diagnosis by a service technician.

If your notebook is under HP warranty, then I suggest you to contact HP support to get the notebook repaired under warranty.

Posted on Jun 02, 2010

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Also you may want to consider checking your Internal fan. Just put your hand near the vent usualy on the side or back of your computer and keep it there when you turn the computer on untill you feal the hot air blowing if you feal nothing for 5 min then you need to replace your fan. This will usualy caus your computer to shut down due to heat damage control when your cpu reaches a certian temp it will shut off. There are to many things to lists with the symptoms you are having but that is the most likely one

Posted on Jun 03, 2010

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