This guide will explain how to repair a failed or loose DC power jack on a laptop computer yourself.

Disclaimer: I’ve made these instructions only for people experienced with soldering and repairing computers. If you don’t feel comfortable doing this job, please do not open the laptop or you can permanently damage your computer. Take your laptop to a professional repair shop instead.
Use this repair guide at your own risk. :)


For this repair you’ll need the following tools.

1. Soldering iron or soldering station. I use Weller WES51 soldering station and for this job I set temperature to about 800-850°F.
2. I use high-tech rosin core silver-bearing solder from Radioshack with diameter 0.022″ ( Catalog #: 64-013 ). I think standard rosin core solder will work just fine.
3. Desoldering pump for removing solder around component leads. I use Edsyn Soldapullt pump, model DS 017.
4. 99% isopropyl alcohol and tooth brush for cleaning the motherboard from flux.
5. A new DC power jack.

DC jack repair tools

Laptop DC power jack repair guide.

Laptop DC power jack

As you see on the following picture, the solder drop on the positive terminal looks different than on other three contacts. That’s where the problem is. The positive pin is not making a good contact with the motherboard and because of that power to the laptop cuts off when I move the power plug inside the power jack.
I’m going to desolder the power jack from the motherboard, clean contacts on both power jack and motherboard and then solder it back in place – this is the proper way fixing the power problem.

DC power jack bottom side

Start desoldering process with adding some new fresh solder to all three contacts. This will make old solder more flowable, easier to remove.

Removing solder

While heating one of the contacts, remove the solder from this contact using the desoldering pump. Repeat the same steps with all power jack contacts until you remove as much solder as possible.

Sucking extra solder

Grab the power jack and carefully try removing it from the motherboard. Most likely you will not be able to remove the power jack the first time because there will be some solder bridges left between the contacts and traces on the motherboard. Carefully wiggle the power jack without applying any significant force and at the same time heat up all contacts one by one. This will help you to remove the power jack.

Remove DC power jack

The DC power jack is almost removed from the motherboard.
Be careful. Inside the positive hole there is a copper sleeve which connects the terminal on one side of the motherboard with the traces on the other side. If you are removing the power jack with force, you can pull the sleeve from the hole. You don’t want to do that.

UPDATE: If you accidentally removed the internal sleeve, check out this post: How to fortify damaged power jack connection.

So, do not apply any force and make sure the solder is melted when you are removing the power jack. I hope you understand what I’m talking about.

Separating jack from motherboard

After the power jack is removed, clean all oxidized contacts with a knife.

Cleaning power jack contacts

Apply a fresh coat of solder to all contacts on the power jack.

Coating contacts

The power jack terminals will look dirty because of melted flux.

Flux on motherboard

You can remove the flux using the tooth brush and alcohol. It’s not necessary but it will make your job looking clean.

Removing extra flux

Apply a fresh coat of solder to all power jack terminals on both sides of the motherboard.

Coating contacts

This side has been coated.

Cleaned contacts side 1

And this side has been coated too.

Cleaned contacts side 2

Now you can install the power jack back on the motherboard. Put something under power jack so there is no gap between the jack and the motherboard. Now you are ready to solder the jack back in place.

DC power jack installed

Solder all power jack pins.

Soldering power jack

The job is done and the laptop DC power jack is fixed. B-E-A-utiful!
Now just install the motherboard back into the laptop and you are done.

DC power jack fixed

Support this site.

 

523 Comments

Pages: « 5350 49 48 47 46 [45] 44 43 42 41 401 » Show All

  1. 443
    Tina Says:

    I have changed out my DC connector and now when I plug up the ac adaptor to try and use the power it starts to spark in the electric outlet when I start to put it in. Do you have any suggestions for this problem? This is my first time attempting anything to do with soldering so I’m not sure what needs to be done to fix it.

  2. 442
    spencer Says:

    What a great article this is.
    This has saved me £150.00, and thats if I could have found a computer shop to touch my computer, the replies I had would have been cheaper to go out and buy a new one. I had to strip my computer down from top to bottom to get to the mother board, and I am a complete novice as well.
    I bought the bits myself, and repaired my old Compaq NX9010 myself, and retrieved all my old data.
    Superb stuff, keep up the good work.

  3. 441
    Ado Says:

    Like many before me I had the Laptop DC jack issue. i.e: No power because it won’t connect with the male plug. Looked online for a solution, all only for the tech savvy. Got a couple of quotes..$100 plus . Not feasible given my old laptop being probably only worth that much. However, my files were worth much, much more.

    Obviously a mechanical problem, so i came up with a quick fix that cost me less than 12 cents.

    Exposed about 8mm of some small gauge scrap automotive wire. Carefully inserted the exposed end into the jack where it connects with the plug, pushed in the plug and woohoo, it worked! I then secured the cable to the laptop with a small keyring threaded through the vent opening so the cable won’t rotate and stays in position. This was three months ago, the only drawback being having the power cable permanently attached, which for me isn’t an issue as the laptop now resides on a desk.

  4. 440
    Don Says:

    I have a toshiba a105 that sparks inside the dc connector when i plug it in. The laptop will not come on and there are no lights that will come on either. My dc connector is not connected directly to the motherboard. It has four wires (two hot, two grounds) and plugs in about four inches down and to the right of connector. After I broke laptop down and removed connector I checked power with metor and it has power going through connector and does not arc off when connector is unplugged from motherboard. This leads me to believe that the dc conn. is good and it is the motherboard plug where the dc connector is plugged that is bad. Do you think that this could be the case? Any other ideas? Thanks for all the great info. Don

  5. 439
    JB Says:

    Thanks so much. I used the same procedure to repair the power jack on an electronic keyboard – worked like a charm!

  6. 438
    Felix Says:

    My laptop won’t turn on, but the charging light is on. I’ve an HP dv6810us laptop. Before I do this, or find someone to do so, do you think this power jack on the motherboard may be the problem?

  7. 437
    David Morley Says:

    Nice article.

    Here are a couple of tips for the desoldering problems. Those desoldering pumps have to be cleaned and greased periodically to maintain good suction. Apply a coat of silicon grease to the o-ring in the pump. I prefer soldering braid to the pumps. It is braided copper that comes in different widths, you should be able to buy it anyplace you got your solder and iron. 1/2 inch braid should work well for desoldering something like the case of these power jacks and 1/8 inch for the power pin.

  8. 436
    J Says:

    @ 472, Rick

    Are you serious…? Why don’t you just carefully open the laptop so you don’t have to deal with a messy looking job?

  9. 435
    sumon Says:

    my dell laptop and i conect the dc power but my power adapter lost the power

  10. 434
    cj2600 Says:

    nisha,

    I ordered a usb board for hp ,does it have dc jack attached to it.

    What HP laptop model you have? They all different.

Pages: « 5350 49 48 47 46 [45] 44 43 42 41 401 » Show All

Leave a Reply