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Power connector i may not have specified that its the connector that is in the notebook and plugs into the board. for the pavilion dv9600 series,sorry if i forgot that part

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No problem, you mentioned it was the power connector right? the 78pbb.

Posted on Aug 17, 2008

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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.

http://www.amazon.com/PAVILION-Series-DC-IN-POWER-HARNESS/dp/B005WMWMMU

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

!O_O!

MOSFET;

http://en.wikipedia.org/wiki/MOSFET

Power MOSFET;

http://en.wikipedia.org/wiki/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,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

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

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679

Scroll down.

http://www.mouser.com/Search/Refine.aspx?Keyword=AO4407

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

http://www.mouser.com/ProductDetail/Diodes-Inc/DMP3020LSS-13/?qs=%2fha2pyFadujguNNSgppBRqXbOxXLwzGsZm9SWxz1EqWpzoSJOpHpWA%3d%3d

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

http://www.youtube.com/watch?v=5uiroWBkdFY

http://www.youtube.com/watch?v=RjpNbuOrOuw

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,

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0wrjcZ1z0x565

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,

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=4100035&

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.

Regards,
joecoolvette



For additional questions please post in a Comment.

Regards,
joecoolvette

Dec 10, 2012 | Computers & Internet

1 Answer

I am having a problem with a hp pavilion dv4. When it is plugged in the charging light will flash when i try to power it on the other lights on the case flicker and die . and if i plug in the laptop...


had a similar problem,and I resoleved it via a bios flash..this allowed the hardware to be fully recognized and to perform the specified role.For some reason,the bios software for this version seems to corrupt after several years. I have had my machine for the last four years..until it recently started giving the issues,it had no problems.

Jun 06, 2011 | HP Pavilion dv4000 Notebook

1 Answer

I have a laptop dv9500. The monitor is black and no bios or any sign of picture,nothing is on the screen just faint blue light. where is the problem?


The HP Pavilion dv9500 is one of the Pavilion dv9000 series of Notebook PC's.

This is the problem, and the possible solution,

http://www.youtube.com/watch?v=bnkQNmKauEc

(TIP: I would use a Heat Gun instead of a torch)

Dec 02, 2010 | HP Pavilion dv9500 dv9600 and dv9700 FF...

1 Answer

PAVILION ZV5000 MAINBOARD: NVIDIA HEATS UP, REST STAYS COLD!


Sorry to tell you but I've seen to many of these - your motherboard has failed. I had one that did the same tried everything except holly water. It is a failed nvidia chip.
Sorry

Glenn

Mar 08, 2009 | HP Compaq Presario V6000T Notebook

1 Answer

I need to replace the power connector in my pavilion dv9608nr notebook by hp. the number stamped on it is 78pbb-90w


Hi Vinman, the DV9600 series pavillion laptops mostly uses the same type of power adapter. these adapters can be purchased in local computer shops, or you may check on Radioshack, walmart, bestbuy or circuit city whoever is the nearest. if possible, bring the broken one with you so that you can personally compaer if you will get an original part, or a compatible part.

hope this helps.

Aug 17, 2008 | Computers & Internet

1 Answer

No power


All lights come on HP Pavilion dv1000 but will not boot. looked at motherboard and by power connector there is a blown part the number on the board shows PD27. I need to know what thhe part is or a schematic showing

Jun 23, 2008 | HP Pavilion dv1000 Notebook

1 Answer

No internet on HP Pavilion Notebook


The first thing I would try is a USB wireless adapter. If this works it may be a hardware problem. If this does not work it is likely a software problem. Make sure the interfaces are not disabled in the connections window. Make sure you are using a good cable, test it elsewhere.

May 01, 2008 | Computers & Internet

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