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HP Pavilion N3250: No video after DC jack repair

I have a hand-me-down HP Pavilion N3250 Laptop running Windows ME. It was performing fine until I started having problems with the DC jack where the AC power adapter attaches stopped functionally properly. After researching th problem, I found that it was apparently a common one in which overheating causes one of the solders to the jack, usually the positive side, breaks or unwelds from the heat causing intermittent power. Being fairly savvy with desktops and not having the money for a professional repair, I undertook the project, using a photo website to help find all the screws and the proper order of removal. To make a long story short, I disassembled, resoldered successfully, and meticulously reassembled everything (no leftover screws!). The power connection nows works great, but I have no video display! The lights all come on in proper boot-up sequence, but the screen shows nothing. Can anyone tell me what to look for as far as what connections might be at fault when trying to troubleshoot? The large card that contains the external VGA connection, serial port, and printer port appears to be properly seated. By the way, the external VGA connection does not work either. Attaching to a separate monitor produces no display as well. So, could this video/sound/serial/printer port card be at fault? Any and all input accepted gratefully. Please don't flame me too bad, as my usual patients are dogs and cats. Thanks.
Bill Snyder, DVM
wtsnyder@bellsouth.net

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  • dogdoc82 Jan 06, 2008

    Got it up and running again. Turns out I had not properly reseated the CPU. I not know the combination for removal and replacement. Thanks for everyone's input.

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Its sounds like some damage was done during the dismantle/reassembly and now the onboard graphics has dies like you said. Could have been cause by static perhaps. Easy to damage them as i have found out myself so dont feel too bad.

Posted on Jan 06, 2008

  • Graeme Fallows Jan 06, 2008

    Good to hear that :)

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Posted on Jan 02, 2017

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The problem is most likely the DC jack in the laptop, a common issue! but to find out the computer must be dismantled down to the motherboard level and the DC jack resoled, might be enough to get it up and running.

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HP pavilion laptop ZV6203CL will not charge the battery anymore, even a new battery, and will not use the battery power, will only power up when plugged AC. Is this a problem in the board or the AC DC...


This must be due to AC DC Power Jack. Test your Laptop with a new one. It can also be the Power Configurations in he Windows Control Panel. Do check those settings also.

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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:

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


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.

Thanks, Joe



I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

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HP Pavilion dv6000 plugged in not charging, I have a new battery.....PLZ Help.


Its the DC charging jack that you plug the charger into on one of the sides of the laptop. Do a google search, go and search for "HP dv6000 DC jack problem charging" (leave out the quotes) and you will see this is a common issue with the dv6000 and laptops in general. Many will just replace the whole laptop motherboard as the DC jack is attached to the board. If you know what you're doing, you change out the jack, quick repair job and keep your own board, but fixed. I would fix it if it were mine. You may be able to find someone local online but if you need someone to do the repair, I'm in the repair directory, as are many others qualified.


Note: It may come to a point, or the situation may just fit better to replace the entire board instead of the port alone. This is usually when the jack is not seated and easily replaceable, or if you are under warranty, HP will replace the whole board.


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1 Answer

Acer 5920g no power


Your DC Power Jack is bad, or the area of the motherboard where the DC power jack attaches to, is bad.

The DC Power Jack, is the small port where your AC adapter,(Charger), plugs into.
This is an example of an average DC Power Jack, for an HP Pavilion laptop, not installed in a laptop yet,
http://www.megaemarket.com/dc-power-jack-hp-pavilion-ze4200-zt117420011721182125.html
If you click on the photo it will enlarge.

The DC Power Jack in the photo is upside down, in relation to how it sits on your laptop's motherboard.
Those flat metal pins shown on top, go down through the motherboard, and are soldered on the other side.

1.Sometimes when the 'charger' plug is in the jack, and is bumped, it can crack the solder joints for the DC Power Jack's flat pins. This makes an intermittent contact. Eventually there is no contact at all.

2.Sometimes it's a bad design of the DC jack, and just from ordinary usage of the user plugging in the charger, and removing it, this can crack the solder joints.

3.Sometimes the small area of the motherboard where the DC power jack is mounted, can crack away from the main body of the motherboard.
To explain:
Crude example;
Envision a laptop's motherboard as having a 1 foot square shape. (It isn't. It's irregular shaped) Now on one side attach a 2 inch square. This 2 inch square, represents the area that the DC power jack is attached to. A 'Peninsula', if you will. There are circuit traces that go along a motherboard. Think of them as Very, flat, thin, strips of copper wire. These 'wires' become stretched, and break as the 'peninsula' cracks away from the main body of the motherboard.

Solution?
Have the DC Power Jack replaced, or the motherboard.
DC Power Jack cost? About $6 to $8 dollars.
Labor? $100 to $150.
The tech has to completely disassemble the laptop, to just the bare motherboard in hand. Then unsolder the DC power jack, resolder a new one in, and reassemble the laptop.
Motherboard cost? About $150 on up. Depends on where you obtain it. (Ebay?)
Labor? $100 to $200.

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1 Answer

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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,

http://www.insidemylaptop.com/disassemble-hp-pavilion-dv6500-dv6600-dv6700-dv6800-notebooks/

[Older HP Pavilion DV6500 through DV6800 models]

DC Power Jack replacement,

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

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.
(Desktop?)

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,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3169580&CatId=2782

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

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1 Answer

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If you have a multimeter you can test the voltage coming out the end of the AC adapter to make sure your charger is functioning properly. Otherwise as is very common with laptops your DC jack is probably "loose". Meaning the internal part on the laptop side has contacts that usually succumb to general wear and tear and have to be repaired. If you have a laptop repair facility in your area that does laptop repair you'll probably want to take it to them. Or possibly contact HP at 1-800-HP-INVENT to find out the closest repair facility for you.

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