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Is this a component in the power supply itself? If so you will want to just replace the whole power supply it is only about 30$. If you need assistance locating a replacement I would be glad to help. Please take a moment to accept and rate this solution accordingly. Thanks, Lee
The most common issue with laptops is the power supply connector in the laptop. They are inexpensive but can be devilishly difficult to replace. I paid $125 for a repair and I use still use the laptop five years later.
The power button may be similar. If you can buy the part, you will find it on eBay. If it is replaceable, there is probably a video on YouTube. You will need make and model to find it.
This sort of thing is a test of whether your repair shop is any good. Before my son tossed out that laptop, a local computer store told him it was a mainboard and would cost $400.
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.
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.