Question about HP Pavilion dv4000 Notebook

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HP Pavillion DV 4000 won't power up

The problem is not: the power cord or the dc jack. Does that mean that it must be the motherboard? If so is this a simple swap of a new board for the old? Never done this before. Thanks a lot for any help.

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  • newjoshua Feb 09, 2008

    Thanks for the suggestions, I took the battery out, but no luck. If my powersupply is dead does that mean that the motherboard needs to be replaced or something else?



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This is a known problem with certain HP and Compaq laptops. Check out the link below to see if you qualify for the free service enhancement program. The same thing happened to me and HP is sending me a postage paid box to mail my laptop to them and they are going to fix it and mail it back.

Posted on Mar 23, 2008

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Well it sounds to me like uve either had a power surge and your powersupply is dead,


this was a funny thing that happend to me, my battery was getting all the power and not allowing any power, so i just removed the battery and it was FIXED!! i was like 'WTF!!!'

hope this helps a bit or even solved your problem,

Posted on Feb 09, 2008

  • Max Boonzaayer
    Max Boonzaayer Feb 10, 2008

    yes this means u have to replace the mobo heres a tip goto your local computer store and ask them what would be better.

    -get a new mobo


    -make them make a backup of your harddrive and get a new computer



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Hello.The most common reasons for power issues are the battery, power jack and power adapter/cord.Power off and remove the battery. If the laptop powers on with just the adapter connected, your battery is faulty.If you move/wiggle the hp pavilion dv6700 power adapter at the point where it connects to the laptop, and the power goes off and on, the power jack is the problem.The power jack is inside the laptop and either needs soldering or replacement. If a power jack problem, it should be addressed by someone knowledgeable.If no change, the power adapter is probably faulty and needs replacement.Hope this helps.

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Sounds like your DC Power Jack where the Power Cord plugs into the computer is bad.

Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.

If the DC Power Jack is bad, then eventually the battery is going to die and you won't be able to boot your laptop. If the dc power jack is bad, the ac adapter power cord can't charge the battery.

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Maybe the battery is bad. Just because it's new does not mean it will work.

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Maybe your DC Power Jack which is where the power cord plugs into the computer is bad. Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.

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I think your DC Power Jack is bad. The DC Power Jack is where the power cord plugs into the laptop. If it is bad, then a good power cord cannot charge the battery, nor can the laptop turn on once the battery is drained.

You say it smelled burnt, that might mean it took a power surge. I always tell people that before your plug the power cord into the electrical outlet on the wall to remove the other end of the cord from the laptop. That way if you get a power surge you will only damage the power cord and not the dc power jack or motherboard.

Anyway, take an ink pen and push it into the dc power jack and see if there is some movement. The little pin or the casing of the jack should not wiggle.

The DC Jack is soldered onto the motherboard. To replace it you will have to take the laptop apart, desolder the old dc jack and solder a new jack onto the board. Sometimes the DC Jack sits in a slot rather than being soldered. The palmrest and bottom case helps to keep it in place. This type of DC Jack usually has a cable harness that plugs into the motherboard.

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You'll need to get your Graphics Card Reflowed and that requires a complete disassembly of your laptop. Get a quote from your local repair shop then check out the guys at:
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Here's a troubleshooting guide from HP that might help you.
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