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Answer to: Why does my computer turn off after a few minutes run time?This particular model of aspire use a SIS chipset with a passive heat cooler, with a gray heat silicone rubber instead the usual heat transfer paste. This gray silicone loses all the termal conductive properties in 36 months, becoming only a rubber patch increasing the core temperature in your laptop, elevating the core temperature to 100°C or more. The only fix is tearing apart the laptop, clean the passive chipset cooler of the gray silicone pad, and put instead a great quantity of new and effective heat transfer silicone or silver thermal paste (better). I've made this procedure on a 5003wlmi with excellent results, lowering the core temp to 50°C.