In order to replace the power jack in your laptop you’ll have to remove the jack from the motherboard as I explained in the previous post: Replacing DC power jack.
While removing the jack you can accidentally pull out the internal copper coating (I’ll call it a sleeve) from the inside of the “+” terminal as it shown on the picture below.
The internal copper sleeve has been removed and cannot be installed back. If you solder the power jack back on the motherboard without this sleeve it might work but the connection between the “+” lead and motherboard will not be reliable.
In the following guide I explain how to fortify a damaged power jack connection. You can use this repair technique in some laptops with similar power jacks.
You can remove the copper sleeve from the power jack with a soldering guy and through it away. You cannot install this sleeve back into the terminal on the motherboard.
Find a small resistor or capacitor with thin leads. Cut off one of the leads. I’m going to use it to fortify the connection between the power jack and motherboard.
Shape the lead as it shown on the picture below.
Put the lead on the “+” connector on the power jack.
Solder the lead to the power jack.
Now I’m going to modify the “+” terminal on the PCB. Even though on the picture below it looks normal, it’s damaged inside (the internal coating has been removed).
Carefully scrape off green varnish around the whole on the “+” terminal on the PCB. You can use a small flathead screwdriver.
If the whole is not big enough for your modified power jack, you can widen it with an awl.
As you see on the picture below the whole on the terminal has been widened. Apply a fresh coat of solder on the clear area of the trace.
Install the power jack assembly on the motherboard. Make sure there is no gap between the jack and motherboard.
Here’s a view from the top side of the PCB.
Solder all pins except the modified “+” pin.
Now, when the power jack is secured, you can shape the lead as it shown on the picture below.
Solder the lead to the terminal. Remove excessive flux with an old tooth brush soaked in 99% alcohol.
Here’s a view from the bottom side of the motherboard.
Be very careful. Doing this modification you can damage the motherboard and make it unusable. Proceed on your own risk.
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April 2nd, 2010 at 1:36 am
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.
March 28th, 2010 at 4:55 pm
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
January 31st, 2010 at 10:35 am
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.
December 17th, 2009 at 7:46 am
hi
i got problem with my laptop power board not main board.
how can find that
December 10th, 2009 at 6:21 am
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.
December 5th, 2009 at 10:38 am
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.
December 3rd, 2009 at 8:28 am
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.
December 2nd, 2009 at 5:52 pm
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.
November 11th, 2009 at 1:02 pm
frankie,
I cannot tell if the problem is related to the fuse or not, but you should search for a fuse located somewhere close to the jack. Test it with a multimeter.
November 10th, 2009 at 2:41 pm
hi,
this site is very usefull
i have a c640 with s faulty powerjack
i replaced it with an other one but still no power.
(he powers up with the docking and battery though)
is it a fuse issue? if yes , wich one?
thanx thanx thanx