On 22/05/2012 04:30 PM, scott wrote:
> IME (which might be out of date by now) the BIOS does actually use 100%
> CPU. I guess it just never puts the CPU to sleep, and loops waiting for
> a keypress.

Yeah, I've seen various DOS and BIOS programs that use busy-waiting 
rather than suspending the CPU. So that /might/ be the cause.

OTOH, under Windows the fan quickly ramps up to maximum speed also. This 
suggests to me that the problem is simply that the CPU is overheating.

> Have you checked the heatsink is properly attached to the CPU? That
> would be my guess.

The purpose of all the measuring was to determine whether the fault is 
the temperature sensors reporting an erroneously high temperature, or 
the cooling system failing to cool the CPU.

The heat-sink /looks/ to be attached securely enough. There is also 
nothing obviously wrong with the heat pipe or the fans. It's quite a new 
laptop, and I can't see any sign of dust build-in in the air vents. It's 
all quite puzzling...

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