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Laptop turned off and wont turn on - Computers & Internet

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  • andyj758 Apr 02, 2011

    i have already tried to restart the laptop after charging the unit over night with no luck...the charging light does not come on even when plugged into the ac....have tried to start without battery in, with no luck and have held power button down without battery in, put battery back in after 10 minutes with no success

  • andyj758 Apr 02, 2011

    my compaq nc8000 turned off suddenly even though plugged into the ac....have removed battery left it out for 10 minutes, held down power button and tried restarting with battery out...yellow charge light comes on and laptop sounds like it is going to start but after about 10 seconds it turns off....left plugged into ac overnight but charge light or ac light does not come on....

  • andyj758 Apr 02, 2011

    this didnt help at all..no change

  • andyj758 Apr 02, 2011

    i dont have a voltmeter...

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Hi,

Welcome to Fixya. After removing the battery and charging it still won't turn on it seems that we need to check if the problem is caused by a bad AC adapter or Motherboard. If it will be possible to use a different working AC adapter to check if you will be able to turn on the computer. If you can then it means that its a problem with the adapter if not most likely this is a problem with the motherboard.

Motherboard Problem:

- It can be the AC adapter port or the mainboard itseft.


this is not a quick fix but If you still have warranty with compaq you can send the machine to a service center and fix it free of charge.

If you have questions please let me know. Thanks for using Fixya.

Posted on Apr 02, 2011

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  • Master
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There could be two reasons for your problem

1. Ac adapter is not making the connection, possible open wire on the cable, the plug / jack is not making the contact. If you have a multitester, try getting the output volts and compare to the actual output volts of the ac adapter. Try wiggling the end plug or the cable and see the readings in the tester. If the readings were not stable/ and or the output voltage drops then you will need a new ac adapter.

2. The battery is deteriorating, the battery can not be charged properly. Older batteries often develop internal shorts that makes it impossible for them to produce the voltage they're supposed to produce.
Check the voltage of the battery using the multitester - voltmeter, If the voltage out drops then replace the battery of the laptop.

Posted on Apr 02, 2011

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  • Master
  • 6,487 Answers

If a laptop wont power ON, this can be a power problem on your unit. First thing that we can do here now is to take the battery out from the laptop for about 30 minutes then after removing the battery try connecting the AC adapter to the laptop and see if there's any sign of light/life on it.

But if still wont power ON after 3 minutes put the battery back in and then charge the unit and after 1 hour try to power it ON and see if its fine now.

Posted on Apr 02, 2011

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