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: « 5322 21 20 19 18 [17] 16 15 14 13 121 » Show All

  1. 163
    cj2600 Says:

    David,

    How am I suppose to resolder the connection at the same time follow the assembly steps on this page?

    I guess you’ll have to have a second working computer or print the guide. :)

  2. 162
    David Says:

    Hi,

    How am I suppose to resolder the connection at the same time follow the assembly steps on this page?

    R/

    David

  3. 161
    Louis Says:

    The solution to my problem on the very first page of the first site I visit. Must be a world first.

  4. 160
    Whohlme Says:

    wow! that was a fast reply! Thank you. I read a general soldering site and it said bulbs are good for general purpose work but the pumps have more suction power and make things easier. I got the bulb for Christmas, but since they are roughly the same price, i may exchange one for the other.

    Also, would a solder accessory kit be worth keeping? It has heat sync, brush, and probes. Thanks again

  5. 159
    cj2600 Says:

    Whohlme,

    is it possible that I use a small de-soldering bulb from radio shack, or should I get the elongated one that you use?

    I think so. As long as it works and you can remove the solder with this bulb. I haven’t tried it myself.

  6. 158
    Whohlme Says:

    Hi,

    is it possible that I use a small de-soldering bulb from radio shack, or should I get the elongated one that you use? Thank you.

  7. 157
    nick Says:

    if you find that the scren still flickrs it may be the pin insde the power supply s loose… relace the unit on te motherboard alltogether that should do the trick

  8. 156
    charasoverride Says:

    you are a crack!

    thanx for this wonderful tutorial!

  9. 155
    ric Says:

    after i resoldered power jack the led lights were flickering. what is that a sign of? loose connection?

  10. 154
    CRN Says:

    Thanks to this article, I saved my HP ZD7000 from the scrap heap! Fixing it with a replacement part bought from Electronomax on ebay, I was able to replace the DC jack with little effort. Unfortunately, I should’ve documented my screw removal a little more carefully as I ended up with about 6 extras screws after reassembly, but everything else feels solid and I did it myself!

Pages: « 5322 21 20 19 18 [17] 16 15 14 13 121 » Show All

Leave a Reply