Question about HP Compaq nx7400 Notebook

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Hi, i have a hp nx7400, it wont start or charge battery. tried with different adapters and with a docking station. when i push on button it will blink 8 times without battery connected, with battery connected and dc power it will blink alot and not stop at 8. does any one have a idea of wich component is most likly to be defekt?

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  • 1,183 Answers

Hi,
Remove the battery from the portable and disconnect the Ac adapter. Press and Hold down the power button for 15 seconds.

Reconnect the Ac adapter only and power on the system. If the system is doing the same . The motherboard on the computer has gone bad.

You can read more on the same on the link below
HP support forum

Thanks for using Fixya
Proton

Posted on Oct 04, 2010

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1 Answer

Will not start


Hello,

It sounds like the DC charging port on the laptop may be damaged, or it may be the power cord...here's how to tell:

First thing....remove the laptop battery, click the battery back onto the laptop and try again. If this doesn't help then read on...

When you put the laptop on the dock, it is getting it's power from the dock connector on the bottom of the laptop. When it is not on the dock, it gets power from your DC adapter. Soooo......take the laptop off the dock and plug the DC adapter into the laptop. Do you see ANY led's light up (on the laptop) when you plug the power cord directly into the laptop? If not, then your DC power adapter for the laptop is probably dead. If you DO see any led's light up when you plug the power cord directly into the laptop but the power button won't turn the laptop on, then the power button on the laptop is the problem.

Take your laptop to an electronics store, and see if they have any universal power adapters for laptops (they come with tips to fit all major laptop brands). Test your laptop at the store with their new power adapter. If this fixes it, then buy the adapter. If this does not fix it, then you should take it to a reputable service shop to get the power button repaired or replaced......or call HP if your laptop is still in warranty.

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DEAD PRESARIO 1925 NOTEBOOK


Try this, with laptop removed from docking unit:

1. Press and hold the laptop power button down, for 10 seconds.
2. Now remove the battery
3. Repeat step one above
4. Let the laptop sit for 10 minutes.
5. Reinstall the battery
6. Make sure docking station is unplugged, and insert laptop into docking station.
7. Plug in power supply (to dock)
8. Start the laptop.
9. IF IT STARTS, let it run a while to see if the battery is charging
10. Remove it from the dock and repeat steps 1-5 above and then go directly to 8 (start without connecting dock).

CONCLUSIONS: If the laptop started in the dock on step 9 but not 10 (only on battery), your battery or power regulator circuit may be damaged. However, if it starts in step 10 but not step 9, your docking station -or its AC power supply may be damaged Let me know how this comes out, please.

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