Question about HP Pavilion dv9000z Notebook

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I have a Hp laptop Pavilion (pav 9000 series) with a blown fuse

The power adapter light to the AC power cord is displayed and charging , but the three little lights in the front are not, I think maybe it is a fuse problem and not the complete motorboard that's bad, it does not turn on at all.

I am thinking a blown motherboard fuse.

Any Idea's ?

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  • Randall  Trahan
    Randall Trahan May 11, 2010

    Its the jack that the power adapter plugs into on your motherboard. It can be replaced but you will probably have to get a PC repair to do it as it has to be souldered.


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  • 53 Answers

Unfortunately I think HP warranty policies state that you can only change by yourself  the components covered by dedicated doors on the chassis bottom, such as the hard disk drive and RAM(obviously your upgrade parts are not covered by hp warranty and not supported by hp support).
So regaldess of how complicated the damage is to fix(most of the led indicators are soldered on the motherboard) you need to call  the HP support and they will fix it, they are usually fast and you will have your laptop back in a week or so...otherwise you will probably lose your warranty if you try to locate and replace the fuse,replace the LEDs, replace the connectors...
it might be a connector plugged backwards but you should not directly try to fix it.

Posted on Feb 13, 2009

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Problem with HP 8510q laptop charging. Charging not working. Laptop working only that time when i have power in battery. Charging light not show. I try other charger but same problem. Is it inside some...

Inside? Yes. (If 'charger' is good)

Diagnostic flowchart:

A) AC adapter (Charger), has to be KNOWN to be good, before going on.
Used on a working laptop to see, or multimeter is used to check Voltage (DC)

The plug end that goes to the laptop, from the AC adapter, has a Center Hole, and a cylindrical outside metal shell.

The Function knob is set to DC Voltage. If just a symbol, the symbol is a dotted line over a solid line.
If more than one DC Voltage scale, the Function knob is set to the 0-50 Volt DC scale.

The Positive (Red) probe lead of the multimeter goes to the Center Hole, and the Negative (Black) probe lead of the multimeter, goes to the cylindrical outside metal shell.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable FROM AC adapter TO laptop, and the power cable TO AC adapter.
If there is a fluctuation on the reading, there is a broken wire, or wires, in one of those cables.

B) Check the DC Power Jack.
This is the jack on the laptop (DC_IN) that the AC adapter plugs into.

Has a Center Pin, and an inner cylindrical metal shell.
Battery removed, use an eraser on the end of a No.2 pencil, and see if you can GENTLY wiggle the Center Pin around.

ANY perceptible movement of the CENTER PIN, means replacing the DC Power Jack,
(By the way, is it an 8510p, or 8510w?)

Any movement of the rest of the DC Power Jack (Body), means replacing it; or may just mean the solder joints are cracked, and can be re-soldered.

C) AC adapter and DC Power Jack checks out?
Problem may be with Power MOSFET's on the motherboard, and associated MLCC's.

(Multi-Layer Ceramic Capacitor, and they are SMD/SMT just like the Power MOSFET's.
Surface Mount Device/ Surface Mount Technology)

Using HP pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's, for an example,

Or, it could be worse,


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  • on Jan 27, 2010 | PC Laptops

    1 Answer

    HP Pavilion dv8 not starting up

    Ya know........Pavilion dv8 is a Series of Notebook PC's.

    Encompasses a LOT of models in the series.

    Have no idea of which LED in front you are referring to.

    Do know;

    1) Test the AC adapter (Charger) with an economical multimeter.
    Average cost is $5 to $12.
    Set to DC Voltage, and check the output voltage of the AC adapter.

    As far as I can tell the DV8 series uses 18.5 to 19 Volts. (DC)
    Use an AC adapter that is rated at 90 Watts, NOT 65 Watts; if using a replacement AC adapter.

    The port on the laptop that the AC adapter plugs into is a DC Power Jack. (DC_IN)
    The plug end on the power cable from the AC adapter, and plugs into the DC Power Jack, has a Center Hole, and an outside cylindrical metal shell.

    The Center Hole is the Positive connection. This is where the Positive (Red) probe lead of the multimeter goes.
    The outside cylindrical metal shell is the Negative connection. This is where the Negative (Black) probe lead of the multimeter touches.

    Also have an assistant gently wiggle the power cord TO AC adapter; and power cable FROM AC adapter to laptop.
    Intermittent reading indicates a broken wire, or wires.

    DC Power Jack LED lights up? Means nothing to me. I want to know the FULL DC Voltage is getting TO the laptop, and there are no breaks in the wires of the power cable, or power cord of AC adapter.

    THEN AC adapter checks out.

    2) AC adapter checks out?
    What condition is the DC Power Jack in?
    Battery removed, use the eraser end of a No.2 pencil, and GENTLY see if you can wiggle the Center Pin around.

    ANY perceptible movement of the Center Pin, means replacement of the DC Power Jack.
    Fortunately for this series the DC Power Jack is connected to a cable with wires, and they end in a plug connector. Which plugs into the motherboard.
    It is now a DC Power Harness.

    HP calls it a Power Connector Cable.

    3) Next in line are the Power MOSFET's, in the power circuit section, on the motherboard.



    Power MOSFET;

    Should be on the motherboard, near where the Power Connector Cable plugs in.
    Rectangular shaped with 8 'legs'. ('Legs' are J-Leads)

    Believe one or more to be the problem.
    Typed the rest above because it is a power flowchart, and when diagnosing always go through the steps.
    Would s-uck to replace a motherboard, when the problem was an AC adapter, it's power cord, or the DC Power Harness.

    This is more on the subject, by using the HP pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's; as examples,

    Further this is to show the availability of the Fairchild Semiconductor - FDS6679 - Power MOSFET, and Alpha & Omega Semiconductor - AO4407 - Power MOSFET,

    Scroll down.

    AO4407 has been phased out. Let's look at one of the cross-reference examples given,

    That is correct. $1.01 USD for a FDS6679, and 78 cents for a substitute AO4407.

    Also check the MLCC's (They are also SMD. Surface Mount Device)
    Multi-Layer Ceramic Capacitor

    Here are examples. Not correct values, Capacitance, (MicroFarad's), and Voltage,

    Scroll down.

    These will be close to the Power MOSFET's.
    See if any are burned, or blistered.

    HP Support > Pavilion dv8-1100 using for an example > Manuals download page,

    Scroll down.
    HP Pavilion DV8 Entertainment PC - Maintenance and Service Guide; in blue.

    This is a free Service Manual.
    Remove ALL Power. Remove the AC adapter, and Battery.
    USE an ESD wrist strap, and have it's alligator clip attached to a good ground source.

    For additional questions please post in a Comment.


    For additional questions please post in a Comment.


    Dec 10, 2012 | PC Laptops

    1 Answer

    My HP dv2000 shuts down and does not turn back on. The power cord is connected but the charging light is not on.

    Your DC connector on the system board is loose:

    Problem symptoms:

    1. Laptop randomly shuts down without any warning.
    2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
    3. The battery will not get charged.
    4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

    If it is under warranty, HP will repair it. If not , read this:

    Click on this link or copy and paste the complete link into your browser.

    If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response.

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