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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May 10th, 2011 at 7:27 am
Jon,
1. Possible memory failure. Try removing memory modules one by one. Test the laptop with each memory module separately, try different slots. One of the modules could be bad.
2. If replacing memory doesn’t help, this could be motherboard failure. Probably related to the graphics chip failure.
If you have nothing to lose, you can try this trick: http://www.laptoprepair101.com.....hics-chip/
May 10th, 2011 at 5:35 am
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?
February 23rd, 2011 at 12:30 am
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 !!
February 11th, 2011 at 5:55 pm
MEDI BARAL,
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.
February 10th, 2011 at 12:13 am
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…
January 31st, 2011 at 10:31 pm
Jodhbir,
You said the jack worked fine for a month and I assume you soldered it properly. This time it could be motherboard failure.
January 31st, 2011 at 9:31 pm
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.
January 30th, 2011 at 9:17 pm
Ram PV,
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.
In fact, I explained how to access the DC jack here.
It’s not some crazy multy-layer motherboard.
January 30th, 2011 at 4:38 pm
shahat,
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.
January 26th, 2011 at 8:51 am
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