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Samsung Laptop Power Button

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Unread 26-07-2015, 04:56 AM   #1
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Samsung Laptop Power Button

Hey everybody,

So my 2 year old laptop recently started acting really strange lately. It's been randomly powering down and sometimes even powering up without pushing the power button.

In addition, my wifi connection has been slow.

So my instinct through this has been that this is hardware problem--that the power button itself is somehow shorting out. So I took the bottom off my laptop and removed the assembly of my laptop, and happened to do so when the laptop was powered on or powering on.

Indeed, the problem is the power button---or power button assembly--probably. I'm typing on my half-disassembled laptop right now without worry of a sudden power down and my wifi is working actually pretty quick now.

The problem is that this power button shares its small pcb with two usb connectors and an sd card reader. I've uploaded an image of this pcb here: http://www.teknoaxe.com/Image/20150725_213411.jpg

If you'll notice, the board isn't clean. That's because at the beginning of the year I spilled a drink on the laptop. So the question is to whether this is a button problem, and the need is to replace the button, or is it possible to clean the board and solve the problem. I'm really wishing that I had a DMM right now.

Another question is that is this something that I can bring to a computer repair shop and not have it cost an arm and a leg to replace the power button. I'd do it myself, but I don't have a soldering iron either.

Anyways, thanks in advance.
Matt

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Unread 27-07-2015, 10:46 AM   #2
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Re: Samsung Laptop Power Button

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You don't need a multimeter to test it, you can jerry-rig something using a 9v battery, an old computer fan and another wire or something like that. All you need is a low-voltage power source (e.g. a battery), a low-voltage power draw (old fan, torch bulb, LED, etc) and wires to connect them together.

As to cleaning it I can't guarantee that will fix it but it's never a bad idea. All you need is PCB cleaner (isopropyl alcohol should do the trick but there's a very slim chance of it dissolving/weakening glues/polymers on the board) and a small paintbrush. If you do try to clean it try to flush out the power button with the cleaning fluid-you can use a pipette to squirt the liquid into it. Make sure the entire assembly is completely dry before trying to use it again.

I can't imagine it would be particularly expensive to have it fixed at a repair shop. It couldn't hurt to ask I guess.

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