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How to replace the ac jack on a n610c

I need to replace the AC Jack on my HP n610c laptop computer

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  • Cyberneticus May 11, 2010

    I presume your AC cable got damaged.

    The solution is "simple and easy", but since you don't know how to do
    it yourself, I'll presume you have no experience with electronics. Solution involves "meddling" with high voltage, therefore I'll have to insist you upload a picture of the defect, but in any case it's a must-see in order to provide the correct repair /salvage instructions.

    Please, snap a close-up picture of the damaged part and a picture of a whole laptop power supply. You can upload them on http://www.imageshack.us/ and then post the links here. I'll provide you with instructions afterwards.

×

1 Answer

Dear Porque,

Try this: Get a standard wall plug from the store with three prongs. Cut off your AC jack at the end near the base of the jack. You will see two wire sets, one copper (brown) the other most probably silver in color. In your new plug, fasten the copper wire with the screw labled L, and the other wire in the screw labled N (neutral) or E (earth).

Replace the plug cover. Plug in your laptop and watch for battery charge indicator. If it discarges the battery in five minutes, your wires are crossed inthe plug. Check again.

If you go to the store with that plug, someone can install it for you at probably no charge at all. I hope there are such nice people in your country

Posted on Feb 19, 2008

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Here below are possible causes and troubleshooting steps of laptop that can't power on, hope it may help:
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1. AC adapter failure.
2. Power jack failure.
3. Motherboard failure.

Possible troubleshooting steps and repair solutions:
1. Test the AC adapter with a digital multimeter. It's possible that you have a failed AC adapter. If you don't have a multimeter, test your laptop with another known good AC adapter.

2.It's possible that power jack (socket where you plug the AC adapter) is broken. Remove the motherboard and take a closer look at the power jack. In some cases you can fix the jack by resoldering it on the motherboard. In other cases you have to replace the jack with a new one. Using a multimeter, test if the power goes to the motherboard through the jack.

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Here below are possible causes and troubleshooting steps of laptop that can't power on, hope it may help:
Possible causes:

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Possible troubleshooting steps and repair solutions:
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Possible causes:

1. AC adapter failure.
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Possible troubleshooting steps and repair solutions:
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Here below are possible causes and troubleshooting steps of laptop that can't power on, hope it may help:
Possible causes:

1. AC adapter failure.
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Possible troubleshooting steps and repair solutions:
1. Test the AC adapter with a digital multimeter. It's possible that you have a failed AC adapter. If you don't have a multimeter, test your laptop with another known good AC adapter.

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Here below are possible causes and troubleshooting steps of laptop that can't power on, hope it may help:
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Possible troubleshooting steps and repair solutions:
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Here below are possible causes and troubleshooting steps of laptop that can't power on, hope it may help:
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Possible troubleshooting steps and repair solutions:
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What does the AC do? (Alternating Current)

Apparently not get rectified into DC electricity by the AC adapter, (Charger), or the rectified AC (Which is now DC), is not getting to the laptop.

Be sure the Battery is still good. They have a lifespan, and only last so long.

Verify, by performing a DC Voltage test with a multimeter, if the AC adapter is putting out the correct Voltage.

If it is an AC adapter for an HP Compaq NC6400 Notebook PC, the DC Voltage coming out of the AC adapter is supposed to be
18.5 Volts. (DC),

http://www.amazon.com/Notebook-Adapter-Presario-cq50-142us-cq50-110/dp/B001MQ4MNW

On the AC adapter plug going to the laptop, the center pin is the Positive connection.
The outer cylindrical metal shell is the Negative connection.

AC adapter puts out 18.5 Volts?
Have an assistant;

1) Gently wiggle the power cord coming TO the AC adapter.

2) Gently wiggle the cable coming FROM the AC adapter TO the laptop.

See if you get an intermittent reading on the multimeter. Indicates a broken wire.

[ An economical, but fine for this test, multimeter, can be purchased for as little as $8 to $12, here in the US.
Analog or digital is fine.
Available in a multitude of stores. An auto parts store is but one example ]

AC adapter checks out it's on to the DC Power Jack.
This jack is the round port on the laptop, that the plug from the AC adapter plugs into.

Battery removed use a wooden small object, and gently see if you can move the center pin around, for the DC Power Jack.

See if the rest of the DC Power Jack will move around.
ANY perceptible movement means a problem with the DC Power Jack.

The DC Power Jack looks like this not mounted to the motherboard,

http://www.batterystyle.com/compaq-nc6400-jack-p-436629.html

Click on the two views shown of the DC Power Jack.
The view on the left shows the jack from the back.
The view on the right shows the jack from the front. The view you see now.

Note that in both views the jack is shown upside down, in relation to how it actually sits on the motherboard.

The view on the left, (Back view), shows Prongs coming from the jack, that go down through the motherboard, and are then soldered.

The gold colored prong is the Positive prong. It goes to the Center Pin of the jack.
All of the silvery colored Prongs are for Ground, or Negative.

Where the Prongs are soldered to the motherboard, are called solder joints. Each prong has a solder joint.

It may just be that one, or more solder joints are cracked.
This would require disassembling the laptop down to the bare motherboard in your hand, then re -soldering any cracked solder joints.

[ Be SURE to use an ESD wrist strap, and have it's alligator clip connected to a good ground source, BEFORE working inside a laptop ]

It may be however that the DC Power Jack is damaged, and replacement is necessary.

HP Support > HP Compaq NC6400 Notebook PC > Manuals page,

http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=64179&taskId=101&prodTypeId=321957&prodSeriesId=1847703

On this page click on - Service and maintenance information

(Under the - Quick jump to manuals by category - heading)

Under the bold - Service and maintenance information - heading, click on -
HP Compaq NC6400 Notebook PC Maintenance and Service Guide
(24 Apr 2007 / 4.61MB )

[ 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 ]

Need guidance in de-soldering, and removing the old DC Power Jack, and soldering in a new one?
Post in a Comment.

If the DC Power Jack checks out, you have a bad power correcting chipset. This is a type of Power MOSFET.
Motherboard replacement is the solution.

Regards,
joecoolvette

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1 Answer

My compaq Evo n610c my battery wont charge when on ac power.The light for when the battery wont go on.


sounds like your DC coonector came loose from the system board.it is a common problem with laptops,

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).
here is how to repair:

http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

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1 Answer

How do i get my hp pavilion zv5000 to run on ac power only. it will only run on the battery.


Zv5000 Laptops are plagued with problems related to the jack on the back of the computer. After prolonged use the jack tends to make the solder joint loose. Jacks can also go bad. The solution would be to check if the power comes on momentarily when wiggling the plug in the jack, if the power comes on intermittently then chances are you have a loose solder joint and may need repaired by a qualified tech. Fortunately, for the technically savvy this may be done carefully provided the proper static sensitive precautions are taken, due to the fact the computer must be totally dismantled to get to the jack and properly inspect the solder connections and repair or replace the jack. Silver heat sink compound must also replace the silicone on the processor ( one dab and compress, do not spread compound!) The jack need should it be replaced can be found on Ebay

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