Our Acer laptop, an Extensa 4420, was exhibiting strange behavior. It would spontaneously shut off, almost as if it was out of power (but it wasn't). Then when I would try to re-start it, it would begin boot sequence, but then shut off. I could repeat this a dozen times, and finally, it would boot, and after that it would be fine.
It took quite a while, but I finally diagnosed the problem--overheating. The unit runs pretty darn hot, and the cooling vents are on the bottom. That works okay if it is on a table, but my family members tend to use it on their laps, and worse, to lay it on the soft couch.
Quite coincidentally, a co-worker was mentioning similar laptop problems. She thought her machine might have a virus, because it shut off in the middle of running her virus scan program. I mentioned our over-heating experience, and sure enough, when she tried making sure it had enough ventiliation, the problem disappeared.
What I wonder is--what are the chances tech support or the Geek Squad would troubleshoot that problem successfully? I have a feeling Geek Squad would happily default to the "Occam's Razor" solution of replacing the cooling fan.
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