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Several (6-7) months ago, my laptop power supply cord got a cut in it and stopped working. Having gotten cheap (and short) power supplies in the past, I decided to buy 2 brand new ones from the manufacturer (ASUS).

Now, I used my laptop a little less than usual between February and March. During that time I noticed a few times that the power supply, even though plugged in, did not provide power. Often the computer would just off on me. I figured it was just that one power supply being bad. I had left the alternate at my parent's house in another state and asked them to ship it to me.

Now, at work the other day I wanted to get a file off the of hard disk. So I booted it up, knowing that it had a low battery, plugged it in. During the first 2 minutes of use, I was told that the battery was low and I should plug it in. I unplugged it, inspected the end (Being plugged in, this was suspicious), and decided I shouldn't plug it back in-- the plastic on the tip was melting from the heat of the metal on the tip.

The computer had simply booted up and I had the file-manager open. It had not been on for more than 10 hours.

Now I know that computers tend to get pretty hot. However, the melting point of plastic is usually above 200C.. so that's much hotter than the computer should be generating.

I went and bought a THIRD power supply. This time a universal one from Best Buy (it was very fast to buy and test). I tried it out on the computer and it's tip is melting as well. My older laptop that uses the universal power supply uses it perfectly (has been about a week and a part of use now). I have tried using the computer without the battery, with the same effect.

Obviously, this is not a problem with the power supply. My room mate and I being trained computer techs were contemplating taking the computer apart and desoldering and resoldering on the power tip. (The computer is about 6 months out of its 2-year warranty).

We're hoping that will correct the issue as I would prefer to devote my money on a Good Desktop rather than yet ANOTHER $1200+ laptop. Is there any thing I'm missing here that might cause the the tip on the power unit to melt?

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2 Answers 2

up vote 4 down vote accepted

You probably have problems with the power connector of your laptop. It somehow has higher resistance than the normal, and laptops tend to consume high currents, it generates a lot of heat. Just bring your laptop to a service, and tell them your problem. They will change your power connector.

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Your power jack might be bad or some other components (fuses, etc.). If you have some soldering experience and can use a multimeter, jump in and see what happens.

I use this Kobalt multi-bit screwdriver and a magnetic tray (Lowes - tool section or Walmart - car section) together with a digital camera to take apart laptops. I place the screws in counterclockwise circle in the tray in the order that I remove them. You can rub a magnet in one direction (not in circles) on the tip of the screwdriver to magnetise it (which does not harm computers [reference Scott Mueller's materials] - people who say otherwise are ignorant).

To find precise directions for your laptop Google the terms "[YOUR LAPTOP MODEL] disassembly" or "breakdown". Read through it thouroughly, but never trust it entirely. You can buy a new DC power jack off of Ebay or use Google to find another provider.

I would estimate the cost of the tools and jack at around $40-60 without a soldering iron. A soldering iron (and materials - solder, flux, desoldering braid, etc.) runs $20-120 depending on what you buy. If you haven't soldered before you might want to consider passing on this and taking it to a computer repair shop.

Hope this helps!

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