A couple of months ago I bought a Satellite L655D-S5066BN. They have not had a single problem with it until I updated the BIOS from 1.40 to 1.50. Thereafter, the cooling fan on / near the left side of the machine is turned on for 5-10 minutes after startup and stays on. Sometimes it stays for 45 minutes to an hour before shutting down, and then remains silent for five minutes or less. After that, start again. For PC Health Monitor, this runs at a speed about 90% while the temperature of the CPU maxes out at only 37%. I installed SpeedFan 4.41 to get a specific reading of the CPU temperature is about 108-115F. All this comes at minimal CPU load - my browser is usually the only open program. The laptop does not feel hot at any part of the chassis. Ventilation in the left side is free of dust and lint, and since the problem has arisen that I've been blowing the vents with compressed air. Also, I checked the BIOS at startup and do not seem to be any setting available with respect to the fan speed / CPU temperatures.
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