In this guide I explain how to modify damaged DC jack. While replacing the DC jack a few days ago I accidentally damaged one of the thermals on the motherboard.

I pulled out the internal copper coating (I name it a sleeve) from the inside of the “+” terminal as it shown on the picture below.

Damaged power jack connection

The the sleeve removed, it cannot be installed back. If you solder the DC jack back in place without this sleeve, it might work but the connection between the “+” lead and motherboard will not be reliable.

The following guide will help you to modify damaged DC jack terminal. This modification should work for most motherboards with soldered power jack.

Power jack removed with sleeve

Remove the copper sleeve from the “+” terminal on the jack.

Unsolder sleeve

Find a small resistor or capacitor with thin leads. Cut off one of the leads. I’m going to use it to modify the motherboard terminal.

Shape the lead as it shown on the picture below.

Power jack mounting contact

Put the lead on the “+” connector on the power jack.

Assemble power jack

Solder the lead to the power jack.

Solder mounting leg on power jack

Now I’m going to modify the “+” terminal on the motherboard.

Power jack terminals on motherboard

Carefully scrape off green varnish around the whole on the “+” terminal on the motherboard. You can use a small flathead screwdriver.

Clean terminal

If the whole is not big enough for your modified DC jack, you can widen it with an awl.

Make hole wider

As you see, the hole on the terminal is now larger. Apply a fresh coat of solder on the clear area of the trace.

Apply fresh solder on terminal

Install the power jack on the motherboard. Make sure there is no gap between the jack and motherboard.

Install power jack

Here’s a view from the top side of the PCB.

Solder all pins except the modified “+” pin.

Power jack installed

Now, when the power jack is secured, you can shape the lead as it shown on the picture below.

Solder five contacts

Solder the lead to the terminal. Remove excessive flux with an old tooth brush soaked in 99% alcohol.

Power jack installed and soldered

Here’s a view from the bottom side of the motherboard.

Power jack view from top

Be very careful. Doing this modification you can damage the motherboard and make it unusable. Proceed on your own risk.

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89 Comments

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  1. 79
    Jon Says:

    I have a Compaq Presario F700. When I plug the DC adapter into the laptop port the blue ring led on the port comes on solid and stays on. However, the laptop does absolutely nothing when I press the power button. I’ve attempted the hard reset methods and everything else I can think of. I know the jack on the mobo feels a bit loose when I wiggle the plug, could it be the jack even though I get the charger connected light still?

  2. 78
    sathesh Says:

    hello i have dell inspiron 1440 cannot switch on battery complete dead.(from adapter model-la65ns2-00)when charge the laptop connect to laptop light turn off.please help me !!

  3. 77
    cj2600 Says:

    MEDI BARAL,

    my laptop is an ibm, but the problem is, it was damaged and didnt work (no power). I was thinking maybe the damage was caused by the lightning that struck nearby when my niece is using it with a globe tattoo plug it… simultaneous to the lightning i saw my laptop sparked… can it be repaired???

    I cannot tell if the laptop can be fixed without seeing the damage.
    By the way, today I received an IBM laptop for repair. No power, no lights, dead.
    You know how I fixed it? Disconnected AC adapter, removed the battery and pushed on the power button for a few seconds. After that plugged the AC adapter back into the laptop and it turned on. Try this method.

  4. 76
    MEDI BARAL Says:

    my laptop is an ibm, but the problem is, it was damaged and didnt work (no power). I was thinking maybe the damage was caused by the lightning that struck nearby when my niece is using it with a globe tattoo plug it… simultaneous to the lightning i saw my laptop sparked… can it be repaired??? thank you…

  5. 75
    cj2600 Says:

    Jodhbir,

    Problem: At the positive terminal of the DC power jacked, soldered in the motherboard, shows 2.4 Volts instead of 19.3 Volts. However,when I measure the voltage without motherboard (take it out), it gives me 19.3 Volts, but when I solder the DC jack again to the motherboard, the voltage drops and it shows 2.4 volts.

    You said the jack worked fine for a month and I assume you soldered it properly. This time it could be motherboard failure.

  6. 74
    Jodhbir Says:

    Hi,

    I have Acer 5000 series laptop which had a broken DC power jack a moth ago. I myself replaced it with a new one. However, now the new DC power jack has a weird problem(It worked fine for one month).

    Problem: At the positive terminal of the DC power jacked, soldered in the motherboard, shows 2.4 Volts instead of 19.3 Volts. However,when I measure the voltage without motherboard (take it out), it gives me 19.3 Volts, but when I solder the DC jack again to the motherboard, the voltage drops and it shows 2.4 volts.

    The copper sleeve is there,and motherboard circuit looks good.I don’t know what is causing the voltage drop.

  7. 73
    cj2600 Says:

    Ram PV,

    I have my 5 months old Gateway NV59 laptop which fell down landing on the power port with adapter in. It was charging for about a month after that in a certain angle only and finally stopped doing so a week back. When I looked at it the pin that is supposed to be in the middle of the port is floating inside, clearly broken.

    I have read the procedure but with the soldering/unsoldering on multi-layered mother board I am not going to attempt it myself. What are my choices — who will be able to repair these at the board level, rather than replace the entire mother board which ofcourse will be very expensive.

    The chances are very good.
    It’s not difficult to replace the damaged DC jack in a Gateway NV59 laptop, if you know how to solder of course.
    If you don’t know how to solder, any laptop repair shop should be able to help you.

    It’s not some crazy multy-layer motherboard.

    Fix Gateway NV power jack

  8. 72
    cj2600 Says:

    shahat,

    i have toshiba laptop satellite A40-231
    DVD drive not working i can’t see any CD .It’s not software

    Does it still play DVDs?
    If the drive can play DVDs but not CDs, you have a failing drive. In this case the drive has to be replaced.
    It’s not difficult to replace the drive in a Toshiba Satellite A40/A45 laptop.
    Simply remove two screws on the bottom and pull the drive from the laptop. You can find a new replacement drive on eBay.

    Remove drive Satellite A40

  9. 71
    shahat Says:

    hi sir
    i have toshiba laptop satellite A40-231
    DVD drive not working i can’t see any CD .It’s not softwer
    i’m very far from any repair shops

  10. 70
    Ram PV Says:

    This website has been very informative.

    I have my 5 months old Gateway NV59 laptop which fell down landing on the power port with adapter in. It was charging for about a month after that in a certain angle only and finally stopped doing so a week back. When I looked at it the pin that is supposed to be in the middle of the port is floating inside, clearly broken.

    I have read the procedure but with the soldering/unsoldering on multi-layered mother board I am not going to attempt it myself. What are my choices — who will be able to repair these at the board level, rather than replace the entire mother board which ofcourse will be very expensive.

    Thanks so much for the information and any help in advance,

    regards,
    ~ Ram

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