It is usually not the Jack itself that has the problem. It is the connection of the battery to the MB. The pins entering the MB get loose with time and heat caused by oxidized connectors and have to be touched with a hot soldering iron to re assert the connections. Delicate work better done by someone used to doing these things.
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Re: Dc Jack replacement
You have to remove the screen from the laptop (in most cases) open the lower plastic case ,lift out the otherboard,carefully de-solder the dc-jack and then solder in a new dc-jack,and the re-assemble the whole thing.
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the dc jack (charging connector) can usually be bought for about 5 pounds or less from ebay. As far as fitting it goes it depends how confident you are. You will need to disassembel your laptop and remove the broken jack from the motherboard and then solder the new one on.
Hello kathywadman: If this is for a laptop it is probably not the cord but the power jack that it plugs into. But I have had a cord go bad at the point that it connects to the plug. Look on the internet and you might find a tutorial on how to fix your DC jack on your laptop. And EBay is your friend when you need to buy the jack.
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Now, I have no idea on what we are working. If it is a motherboard, then you need to order the correct plug replacement, and then study and compare where it goes, and make absolutely sure you use a clean solder gun of possibly 30 watts. Use the very small solder available at most stores like Radio Shack. If you never soldered anything, then this is not a job you want to do. Get some help from someone who has done work of this type. Because, if you do not do it right, you can destroy the board.
Because the circuit boards on anything are delicate, and cannot take too much heat, you have to know what the boundaries are and how to handle a project like this.
If so, the DC jack on the laptop is bad. The connection between the jack and the motherboard gets loose, or the center pin gets loose. The only fix for this is a jack replacement. It takes soldering skills. You can get it repaired for $100-200 bucks, depending on the shop.
If you have soldering and electronic skills you can do it yourself, but it is tricky if you have never done it.
The only other option is possibly the power cord is bad at the end, where there might be a bend. Sometimes both the power cord and Jack are bad.