How to modify damaged DC jack

posted in: DC jack, Motherboard | 92

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.

92 Responses

  1. I have attempted to resolder a dc jack on my laptop. All soldering points look even, as the jack sits flat aginst the board and no spaces are identified in the soldering. However, when I connect the AC adapter the dc jack sparks. Is there something I can do to fix the sparking?


  2. Fillie

    I was trying to fix powerjack problem on toshiba satellite A75. I damaged on end of white ceramic component near the power jack with the solder. on the component its wirtten “F 12A”. (is is the same component which is visible in above pic no 6,7,8,&9) It has two metalic caps on its end. one matalic cap came off with when I was trying the solder I by mistake put on it. Is this component a fuse? How can I fix it?

    Another tiny component named PC1 got a drop of solder on it. can that be fixed?
    I will appreciate any help


  3. hi, i have acer aspire 2930 series and dead. i take out the battery and pluged in the power adapter. and I check the voltage on mother board which is solder part connecting to DC-in power jack, it shows 19v. Is it means that my DC-in power jack still ok?

    I also check the battery connector, it shows 19v, is it means my mother board still ok?

    I suspecting the power board is dead. but 2930 series have power board separated with DC-in power jack. power board only for power button and connected to MB, DC-in power jack also straight connected to MB. Not like other acer laptop which is DC-in power jack connected to power board and power board connected to MB, so if power board dead, there is no current goes to MB. I also susspecting the power board, because it looks burned(i can give the pic), but it looks doesn’t make sense because DC-in straight away go to MB.

    Please help me, thanks.

  4. hey my charging ports arc snapped so i soldered it and now it works but only if i apply pressure to it because the solder keeps breaking its a acer aspire 4720z and i wanted to kno if you knew how i could fix it for good or get a new one

  5. Hi. I just want to ask, i have an acer aspire 5920 laptop and my problem is i have a working charger for this but everytime i connect it the lights on the charger turn off so i have to unplug the charger to the laptop and unplug it to the electric plug and plug it again so the lights will turn on again then if i plug it to the laptop again it went off. What do you think the problem of my laptop? By the way thank you in advance if ever someone reply for my problem.

  6. hi

    i got problem with my laptop power board not main board.
    how can find that

  7. Hi, I need to buy a new adapter for my laptop. The input requirement is 100~220V, 1.7A. I found this adapter with input 100~220v, 1.64A, both output specs are the same. Is this adapter compatible giving the input Amp is lower? thanks.

  8. Hi again. I wish I could edit my first post and merge the three questions into one.
    I have one more request. I have a touch pad cable connector/latch broken on my laptop. The touch pad doesn’t work as a result of this. I checked the cable itself and it looks intact with no breakages anywhere.
    You have a guide for what to do if the keyboard cable connector is broken but nothing for a touch pad cable connector. Please help me out. Thanks.

  9. After researching some more I think the component might be a diode and not a fuse or resistor. I think it says D1 on it and the power board/usb combo part no. is 446524-001. I appreciate your help.

  10. Hi I have a dv6500 with what looks like a blown fuse on the power connector/board. I went to connect the AC adapter after I got the motherboard out and heard some hissing sound and could smell burning rubber.

    So I was wondering if there was a way to replace the tiny black fuse on the power board. It looks burnt and is moving somewhat. If nothing else works I can just order the power board which thankfully isn’t directly connected to the motherboard. But this part is very expensive and I would like to avoid replacing the whole power board if at all possible.

Leave a Reply