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DC Power jack heats up to very hot to touch on HP NX9010 laptop.

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The DC jack, where you plug the power adapter cable, might be loose or defective, & needs to be either re-soldered or replaced.
In order to do this, the laptop needs to be disassembled & the motherboard taken out. Also, the motherboard needs to be checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether.

Posted on Sep 09, 2010


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My acer aspire 7720G shut down random

Wait a minute. What?

From what I read;
1) One wire of the AC adapter (Charger) is hot to the touch.
'.....when I touch the charge one part of the wire is very hot."

2) AC adapter checks out as far as voltage is concerned.
"I tested the charger voltage and everything is ok."

3) "Sometimes when I touch the charge appear the icon...Could it be the charger broken wire?"

Does this mean, "Sometimes when I touch the AC adapter (Charger), the battery icon appears."?

Battery is CHARGING icon?

Could it be a broken wire in the power cable TO charger?

Uh, yeah.

1) AC adapter NOT plugged into the DC Power Jack, plug the power cable of the AC adapter into power.

Multimeter set to DC Voltage, and proper scale, red Positive lead to harness wire that goes to DC Power Jack's center pin;

,black Negative lead of multimeter, to wire that goes to DC Power jack's inside cylindrical metal shell;

Now gently wiggle the cable from the AC adapter, TO the DC Power Jack of the laptop.

Do you get an intermittent reading?

2) Also, how did you replace the DC Power Jack? What steps did you take?

Did you reuse the wire harness, and solder it to the DC Power Jack?
Have a lot of experience in desoldering/soldering?
What tools did you use?

25 Watt soldering iron?
.025 or .030 rosin core solder?

Desoldering Tool, or Desoldering Braid? (Solder Wick)
Side Cutters instead, and slightly shortened the wires of the DC Power Jack's harness?
(Then tinned the wires, and soldered the wires of the DC Power Jack harness, to DC Power Jack?)

Damp sponge, and cleaned the well tinned No.2 chisel tip, of the soldering iron, frequently? Used rosin solder flux?

Center pin wire (Positive), of harness cable TO DC Power Jack, was soldered to the center pin of the DC Power Jack?

Negative wire of cable TO DC Power Jack, was soldered to the inside shell of the DC Power Jack?
(Cylindrical shell, inside the DC Power Jack, that surrounds the center pin of the jack)

Sure there are no cold solder joints?

Not trying to 'browbeat' you, just am curious.

1) IF you are SURE you have the polarity correct, of the wires in the harness cable, that goes to the DC Power Jack;

,and you are SURE there is no broken wire, in the cable from the AC adapter (Charger) TO the DC Power Jack;

,and you are sure you made good solder joints;

I suspect the power correcting chipset on the motherboard, to be bad, or perhaps a Diode.

One example of the chipset I am referring to. This one is used in a lot of laptops. May not be used in yours, but gives you something to refer to when looking for a bad chipset, in the power stage, on your motherboard,

Usually when bad the top of the chipset will be blackened, or bubbled.
A Diode is a one way valve for electricity. When they go bad it is visually obvious.

Post your findings in a Comment.

Jun 10, 2012 | Acer Aspire Computers & Internet

1 Answer

HP Pavilion dv8309US (EZ590UA). My issue is the power. I would have it plugged in and the computer would not recognize the cord being plugged in as time went on it would not charge the battery and now does...

First of all check out the AC adapter (Charger) and see if it is putting out 18.5 Volts DC
If you do not have a multimeter, an economical one can be purchased for around $8 to $12.
Carried in a multitude of stores. An auto parts store is one example.
Analog or digital, either one will do. (I prefer analog with a meter, and a needle)

Plug the AC adapter into power. (Not plugged into the laptop)

In the plug at the end of the cable from the AC adapter, that plugs into the laptop, is a Center hole, and a metal shell which surrounds the outside.
The center hole is Positive. This is where the Positive (Red) probe lead touches.
The outer metal shell is Negative. This is where the Negative (Black) probe lead touches.

Function knob on multimeter is set to DC Voltage.
(Symbol is a dotted line over a straight line.
The curved line over a dotted line is for AC Voltage. VAC, and VDC are also used. Voltage AC, and Voltage DC)

Voltage reads close to 18.5 Volts? (DC)
Have a helper wiggle the cords around. The AC cord that is connected to the AC adapter, and the DC cord that comes from the adapter, and plugs into the laptop.
See if there is an intermittent reading.
Indicates a break in the wires of the cable.

If there is a break most of the time it will be where the cable meets a connector, or cable meets the AC adapter, or meets the AC plug that plugs into the receptacle. (AC receptacle. Surge protector, or on the wall)

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

AC adapter removed from laptop, Battery removed also.
The DC Power Jack is the round port on the laptop, that the plug from the AC adapter plugs into.
See if the center pin is loose. Try to gently wiggle it. You may have to use a tool such as a pencil.

Center pin checks out?
See if the metal shell that surrounds the center pin is loose.
Either one indicates replacing the DC Power Jack.

The DC Power Jack for this model is not soldered directly to the motherboard. The rectangular DC Power Jack slides down into a slot in the outside of the laptop's lower case.
The DC Power Jack has a cable coming from it, and the connector at the end of the cable plugs into the motherboard,

Click on the photo to enlarge.

No damage apparent from outside the laptop?
Suggest you remove the DC Power jack and cable, and perform a Continuity check on it.
(Function knob set to Ohms. 1K
Should have an Omega symbol for Ohms. Look like an upside down capital U.

Positive probe lead touches the center pin. Negative probe lead goes into one of the three socket holes, at the opposite end of the cable, in the connector. (That plugs into the motherboard)
You can't physically see what wire goes to what unless you remove the sheath off of the cable.

No need. Just touch all three socket holes one at a time.
If there is no reading you have a break in the wire in the cable, or the wire's connection at the DC Power Jack is bad.

Once you find out what wire (Socket hole) is for the Center Pin, run a continuity check on the Outside Shell of the DC Power Jack.

Now connect the Positive probe lead to the Center Pin, and the Negative probe lead to the socket hole for the Outside Shell. There should be no reading.
If so wires are touching inside the cable.

DC Power Jack and it's cable check out OK?
Suspect a bad sensor on the motherboard. A Chipset.
Reads when the AC adapter is plugged in, and reads when it alone is being used.
Reads if the Battery needs a trickle charge, or a full charge, or no charge.

Requires motherboard replacement.



NOT advertising for either seller above. From a quick search. Proceed at your own risk.

HP Support > Pavilion dv8309us Notebook PC > Manuals,

In the list left-click on -
HP Pavilion dv8200 Notebook PC, HP Pavilion dv8000 Notebook PC - Maintenance and Service Guide.
This is a free Service Manual.

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 link it may take up to 30 seconds for the first page to come up.
It may also take additional time for the file to fully download.

You can save a copy to your computer. (The above is a temporary download. After you close the PDF window, you have to go back to the link, and download again)
If you save a copy to your computer you can burn it off to CD disk, and have it anytime you want.
After checking out that the copy is good, you can delete it from your computer, and save harddrive space.

In the Bookmarks menu to the left, left-click on the + sign next to -
Removal and replacement procedures

Scroll the page down, and left-click right on -
5.23 Fan Assembly (Page 162)
Page 165 deals with the DC Power Jack and cable removal. (HP - Power Connector Cable)

5.16 System Board deals with replacing the motherboard. (Page 140)

For additional questions please post in a Comment.


Sep 16, 2011 | HP Pavilion dv8309us (EZ590UA) PC Notebook

1 Answer

Dc jack of labtop getting vey hot

A common weak spot on most laptops is the DC power jack. If someone trips on the wire while you have the power adaptor plugged into your laptop, chances are that the power jack will get damaged.
On most laptops the DC power jack is soldered directly to the motherboard and there are only three or four small pins holding it in place. Unfortunately that makes the power jack quite weak. Any sideways pulling of the DC power cord while attached to the laptop will usually dislodge at least one of these pins, breaking the solder around it. Modern laptops use quite a lot of power, from about 70W to 120W or even more. The bad electrical connection from the dislodged pin will cause sparks and heating that will eventually burn a hole through the motherboard and can even be a fire hazard.

The usual signs of that are:
  • The battery is not charging properly or stays at half charge despite that you have been using the power adaptor.
  • The screen flickers (the brightness is changing) while the power cord is plugged in. This is caused by the laptop switching between DC power (screen is brighter) and battery power (screen is dimmer).
  • The DC plug gets hot after a few minutes of use and may even smell of burning.
  • There are "scratching" sounds coming from the DC jack.
You need to take the unit apart and check/resolder the DC jack on the system board.

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

Thanks, Joe

Feb 15, 2011 | Computers & Internet

1 Answer

Power connection loose


There might be the issue with DC in cable jack so need to get it checked through a software vendor.


Apr 08, 2010 | HP NX9010 Notebook

1 Answer

My hp compaq nx9010 wont power up. dc supply is good and the batteries are ok. No led light...

This is a typical symptom of motherboard failure. Your laptop's motherboard will need to either be serviced or replaced.

Feb 16, 2010 | HP Compaq Business Notebook NX9010

1 Answer

Power Supply Port Burnout

1) You need to replace the DC Power Jack. This is the port on the laptop where the AC adapter (Charger) plugs in. {Power port}

Most so called repair shops won't touch this. (Notice I stated so called) They will want to replace the entire motherboard. {Geeks are us}

A bona fide computer repair tech can replace the DC Power Jack. Cost of jack? Around $10. Repair bill? From $50 to $125.

[Entire laptop needs to be disassembled, down to the bare motherboard in the tech's hand. Precise de-soldering, and soldering skills, are needed for the DC Power Jack replacement. Reassemble laptop.

This gives you an idea of what is involved,

[Older HP Pavilion DV6500 through DV6800 models]

DC Power Jack replacement,

2) Replace the AC adapter. If the AC adapter has a separate cable from the power unit, to the laptop, then by all means just replace it. May be more of a headache, then just buying a universal AC adapter.

Barring none of the above is a feasible approach for you, and you wish to save the information on the harddrive, of both your laptop, and your brother's, I would suggest an economical external enclosure.

Remove the harddrive, and install it in the external enclosure. The enclosure has a USB cable, and is plugged into any available USB port on a separate computer.

The HP Pavilion ZE5000 series of laptops, (Business Notebook's), use an IDE (PATA) harddrive.
It is 2.5 inches across in width.
(Desktop harddrives are 3 and 1/2 inches across in width)

This is one example of a 2.5 IDE (PATA) external enclosure,

To remove the harddrive, I'll need to know the exact Product Number.
This is on the bottom of the laptop in a white Service Tag.
(DO NOT give out the Serial Number. S/N)

Feb 10, 2009 | HP Compaq Presario 2500 HP Pavilion ZE...

1 Answer

Has no power

check your DC Jack on the back where electricity is plugged in to the laptop-

Maybe a bad connection.
With Thumb- push the jack to the left and press power button. If this doesn't work, Also try pushing to right, and trying the power button. If you get lights, or it powers on that verifies that you have a DC jack issue.

Do not attempt to use by holding it or using duct tape, get it repaired. If you attempt to use by holding or taping you will further damage the contacts around the jack internally and render the motherboard unrepairable-requiring replacement. This is only a test verification method.

The cost of DC Jack repair/reflow is $50- 100 depending on your area/region.

Try local first before mailing off your laptop!

Mar 22, 2008 | HP Compaq Business Notebook NX9010

1 Answer

HP NX 9010 DC Jack on fritz

It is unlikely you need to solder a NEW jack. Just resolder all 3 lugs (and support lugs) on the existing jack. After extended use (and especially if you catch the cord with your foot and stress the jack with that kind of leverage) the connections to the motherboard get loose. A clean soldering gun and flux core solder will usually repair everything fine. Add a bit of extra solder to each lug (but never enough to contact any other connection). Then I always finish with a few coats of super glue or epoxy between the jack body and the motherboard (but you must be sure not to get any fluid inside the jack/connectors!). The glue adds strength and makes it better able to resist the stress. Lasts a lot longer. But you must be very sure of yourself, to open a laptop. If you are not 100% confident, then yes, you should go to Best Buy as you asked. If you do it yourself, and cannot download a manual for this, then it is vital to take notes of where each part/screw goes, and the order you disassembled things.

Feb 14, 2008 | HP NX9010 Notebook

1 Answer

Presario 2500 hp

just google Compaq Presario NX9010 replacement DC Jack

Jan 22, 2008 | HP Compaq Presario 2500 HP Pavilion ZE...

2 Answers

Dc Jack replacement

you have to remove the screen from the laptop (in most cases) open the lower plastic case ,lift out the otherboard,carefully de-solder the dc-jack and then solder in a new dc-jack,and the re-assemble the whole thing.

Dec 19, 2007 | Computers & Internet

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