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

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523 Comments

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  1. 503
    Spuffler Says:

    Yellow Glue looking stuff is usually Rosin, Rosin has been used deliberately by solder manufacturers since the 1940s to make solder flow cleanly and is also there to ensure the solder does not become grainy as it cools. Washes off with 91% Isopropyl Alcohol. In some unusual cases, the glue looking stuff might be a different material used with newer solders, but serves the same purposes and cleans the same way.

    NOTE: Modern electronics are become RoHS compliant, RoHs requires a totally different alloy for soldering, which alloy must not contain Lead. Repairing RoHS devices may cause mechanical issues if you add Lead alloy solders when repairing connections. Power jacks might not last very long if you resolder a RoHS board with Lead alloy solders. Just sayin. >25 years as an Electronics Technician.

  2. 502
    charly Says:

    Hi I just replaced a jack on a good friends Toshiba a75 laptop because of your incredible instructions. He couldn’t afford a new one so I decided to help. I can’t thank you enough for taking the time to publish this guide. It worked fantastic. People like you renews my faith in the human race. Your amazing !! Thanks again

  3. 501
    RP Says:

    Hi, I have a Acer Asprire 9400, my power jack has barely no solder on it. There is kinda yellow lookin glue. How do i remove that? I thought it was solder and then tried removing it with copper braid but now it looks like i melted the yellow lookin glue? and now the jack metal and glue/copper is stuck and wont melt. Any ideas how to remove or what that is?

  4. 500
    Mengueche Says:

    You really help me, my sister gave me her a75 SATELLITE to repair, y have no idea about how to set back the power jack because it was “repaired” once, but the person who did the job didn’t take the necessary care and just le it all dirty.
    I really apreciate people like you, my best wishes!

  5. 499
    Lawrie Says:

    I have had to repair my A70 power jack a twice. The last time was permanent. My machine cannot have a soldered connection at the keyboard side of the motherboard and the positive post (single post at back end of jack)or it shorts out. On the jack, before assembly, a small piece of wire wrapped around the positive post brings better contact between the jack and the motherboard. After soldering the other three posts (one negative and two anchors), check to see that your board can be powered up. I plug in the jack and press the start button. Then, if working, unplug it and reinforce female part of jack by putting a little epoxy along side of the jack, where it contacts the motherboard, to stop it from moving. It’s impossible to solder this on my machine because the fuse is in the way. Then reassemble the machine. Note beside the screw holes the screw size is indicated (F3, F5, F8). F8 is the longest and must be only put in F8 holes.

  6. 498
    fred aidi Says:

    Thank you,

    You are the best on the net. You give us break from those ripoff like the geeks and what have you. I fixed my problem by using your instructions on the dc power jack. The Geeks in Best buys asked for $800 saying I need to change the whole motherboard. I noticed I am loosing power every time the computer moves or evern vibrate. I am familiar with little sodering and fiddling with electronics. I felt very comfortable with your instructions and was able to fix my problems. I will donate soon because you more than desrve it.

    Thanks

    Fred

  7. 497
    cj2600 Says:

    @ Brandy,

    I would personally replace the entire power board. It’s more reliable repair.
    By the way, it looks like Dell Inspiron 1546 and Inspiron 1545 power boards are identical.
    You can buy a ndw power board for Dell Inspiron 1545 laptop on ebay for about $20.

  8. 496
    Brandy Says:

    So my fiance and I replaced the power jack on my Inspiron 1546 laptop. However, It will not turn on now. When we plug in the AC adapter the power light turns on, but nothing else.
    The power jack is actually mounted to its own board with a USB/Ethernet/VGA port. A ribbon connects the board to the motherboard.
    I honestly feel that my fiance was a bit too rough with the power board because at one point it was slightly bent. Although he straightened it out, it worried me. I also noticed that not all of the sodder was cleaned off. Additionally, some of the green was scraped off around a few of the holes.
    All I want to know is if it is worth attempting to resodder again and clean the power board up? Or buy a new power board for 79 bucks online?

    Please adivse.

    Thanks,

  9. 495
    sabeshan Says:

    You are really Help People..Thanks a lot for your Service..Bro!
    God Bless you ..!

  10. 494
    cj2600 Says:

    @ Andrew McElroy,

    1. After you replaced the DC jack test it with a multimeter. Make sure there “+” and “-” not shorted.
    2. Plug in the AC adapter into the jack and test voltage on “+” and “-” terminals. Make sure the motherboard gets power.

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