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Power problem PAVILION zv5000 (AMD) sn:CND5190R9W.

Good Afternoon,

Power adapter is working well (voltage checked). Jack connector looks ok. When the power adapter is pluged in, it is not charging the battery at all. System (Windows xp) does not see that power is coming from the pluged power adapter. It says that "Source of power is: Battery". The battery is dead. After half a minute the system is shutting down itself with the cling noise coming from the mother board area.

Is there any possibility to recover from this situation without replacing the main board? Do you have any suggestions to rectify the problem? Notebook is 2 years old.

Thank you very much.


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Yes, I have found that the solder joints on connector terminal on the motherboard become unstable/dry/cracked after a period of time, t seems they are not strong enough to cope with constant movement of plug

Motherboard can be removed and joints on base of power adaptor connector on MB resoldered, once again restoring connectivity from power adaptor plug to mainboard.

Use a moderate temp soldering iron.and thin solder and redo solder joints on power adaptor socket.

Posted on Dec 04, 2007


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HP dv6000 laptop not charging problem, adapter, battery and power jack looks like it works fine

If your battery, charger, and DC Jack are ok, then the most common problem is the surface mount transistors on your HP's main board called MOSFET's. They are small 30V N channel 8 pin components soldered to the main board. The boards also have transistor circuits which switch back and forth between a charging and discharging state. However these rarely ever fail. The MOSFETS fail because of the thermal loads which they must endure. Although some notebooks (like the Gateway I'm currently on) have a DC jack which serves dual purpose of supplying DC 19V AND connecting/disconnecting charging circuit. However your HP dv6K does not.
However it's worth mentioning that these models have had all sorts of problems...most notably poor thermal design to begin with that usually creates solder connection problems with the main chipset especially on AMD models. Good luck.. :)

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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 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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HP Pavilion DV2000 will not start when power button pressed

Could be a bad;
1) AC adapter (Charger),
2) DC Power Jack, (Jack that the AC adapter plugs into on the laptop),
3) Power On switch, (Power Button Board),
4) Display Lid Switch Module,
5) Power MOSFETs on the motherboard,
6) Ceramic Capacitors on the motherboard.

1) AC adapter:
General example,

The plug end that plugs into the laptop has a Center Hole, and a cylindrical metal outside shell.
The center hole is the Positive connection.
The cylindrical metal shell on the outside is the Negative connection.

Multimeter function knob set to DC Voltage, the Positive (Red) probe lead goes to the Center Hole.
The Negative (Black) probe lead touches the cylindrical metal shell.

[An inexpensive multimeter can be purchased for as little as $5 to $12. Available in a multitude of stores. An auto parts store is but one example, or look on the checkout aisle racks of major discount stores.
If just a symbol, the symbol for DC Voltage is a dotted line over a solid line. More expensive multimeters have an auto detect feature, that sense when the multimeter is connected to AC voltage, or DC voltage )

You should read 18.5 Volts (DC)

While testing have an assistant gently wiggle the cable from AC adapter to laptop, and the power cord to the AC adapter. A fluctuation of the reading indicates there are broken wires.

AC adapter checks out OK?
Go to the DC Power Jack.

The DC Power Jack on the laptop may have DC_IN next to it.
It has a Center Pin, and surrounding metal shell.
Battery REMOVED, use a No.2 pencil, and see with the easer if you can move the center pin.

If so the jack needs to be replaced.

The DC Power Jack for this model series is attached to wires, that end in a small white plug.
The small white plug plugs into the motherboard.
Easier to replace, than models that have the DC Power jack soldered directly, to the motherboard.
It's a DC Power Harness, and HP labels it a Power Connector Cable.

HP 430462-001 for models that have a UMA motherboard.
HP 430461-001 for models using an Intel processor.

DC Power Jack checks out OK?
Power On switch.

In the list click on -
HP Pavilion dv2000 Notebook PC Maintenance and Service Guide

This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the above file name, it may take up to 30 seconds before the first page comes up.

The PDF reader page numbers, and the actual manual page numbers, do not match. When I refer to a page it is the PDF file page.
Go to Page 141 - Switch Cover
Pages 142 and 144 have more details on the Power Button Board.
(Power Button Board is HP part number 417084-001)

How to test?
Multimeter set to OHM. Straight pins (2) in the socket holes of the removed, Power Button Board's cable connector.
Positive probe lead to one pin, Negative probe lead to the other straight pin.
Press the Power On button.

ANY reading indicates a good Power On switch.
No reading of course means a bad one.
(Remember; the Power On switch is a Momentary Contact Switch.
You will just get a brief reading on the multimeter, if good)

Or you can use a small flat tip Jewelers screwdriver, and TEMPORARILY touch the two contact pins on the motherboard, where the Power Button Board's cable plugs into.

Page 179 for the Display Switch Lid Module,
(HP 417087-001),Laptop,Part,417087001.aspx

Unplugging the Display Switch Lid Module from the motherboard, and pressing the Power On button, starts the laptop, you need a new lid module.

Power Button Board, (Power On switch), and Display Switch Lid Module checks OK?

Motherboard problems.
There are Power MOSFETs on the motherboard. These are located close to where the plug of the Power Connector Cable, plugs into the motherboard. (DC Power Harness)

The Power MOSFETs control;
Whether the Battery needs a full charge, or a trickle charge.
Whether the laptop is to just run off of the AC adapter, or Battery.

Look to see if any are blackened, burned, or blistered.
Information using the HP Pavilion dv6000, and Pavilion dv9000 series of Notebook PC's,

Just to show the average cost of a Fairchild Semiconductor - FDS6679 - Power MOSFET,

One dollar and one penny USD.

Looking at the second photo down on the Mayohardware blog link, look at AO4407.
(Alpha and Omega Semiconductor)

Look to the right of the Yellow circled AO4407. That small rectangular shaped object, with a dark wide band on it, is a Ceramic Capacitor.
There is one above it of the same size, one above that, and one to the right of the top one.

Average cost of them is around 62 cents to 80 cents.

Average cost of a replacement motherboard is around $40 to $60 on Ebay.

That does it for me right now. Post additional questions in a Comment.


[If you had stated it seemed the laptop came on, but had a blank screen, that is a Different problem ]

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You either have a bad adapter or a broken power jack in the laptop. To check the adapter use a multimeter set to voltage and connect one lead to the center in and the other to the outside metal contact. You should get a reading from 18 to about 26 volts. If you get no reading then the adapter needs to be replaced. If you get the correct reading then the power jack in the laptop will need to be replaced. If yo are ok with electronics repair you can get the jacks from if not your local computer repair shop should be able to do it for you.

I hope this helps, If so please rate my solution,

Corporate Computer
Over 21 years of PC and printer support/repair.

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