I've had a laptop for two years, and it has worked fine until recently when it stopped charging while plugged in to its power supply. What do you think could be wrong? I was guessing that the cord may shorting internally. Could this be the case? What can I do to fix it?
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A lot of times there is a (pico)fuse that blows in laptop power supplies. You'll have to crack open the semi-permanently sealed plastic box, I've had decent luck prying around the perimeter (where the two halves meet) with a small flathead screwdriver. Once it's open, start tracing the power path from the 110v side. The fuse is typically the first component you will come to and will be wired in series with one of the input power tracks. They are sometimes difficult to locate because they do not look like a normal fuse and most often aren't labeled as such either. |
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Have you verified that the battery is good? Batteries do have a lifetime so this could be a bad battery not a bad power supply. |
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I was able to salvage the power supply. I opened the case by gently hammering a flathead screwdriver along the seam of the powerbrick. Nothing looked charred, so I moved on to the cable. I clipped the cable about an inch from the powerbrick and tested continuity, end-to-end, for each contact. No matter which combination of wires I measured, I had continuity--not good! There was a short somewhere along the length of the cable. I isolated the short by clipping off segments of cable (moving toward the laptop connector) until there was no longer continuity between the opposing contacts. I then stripped back the insulation and soldering each lead back on to the corresponding contact on the powerbrick, plugged it in, and it worked! Let this be a lesson to coil cable properly, I suppose. |
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