OT: Audio Feedback Problem on Thinkpad T40

[Björn Persson]

R. G. Newbury wrote:
> Booted my Thinkpad T40 this morning and it immediately started a high
> pitched feedback squeal. The volume controls do nothing and of course
> there is nothing in the BIOS section to even attempt to control or
> change the behaviour. Interestingly, it also seems to affect CPU usage:
> the machine is very slow in responding to inputs, but top shows nothing
> out of the ordinary.
>
> Anyone have any thoughts about what is going on?

Are you sure the sound comes from the loudspeakers? I was thinking perhaps the 
noise is from a broken fan and the CPU slows down to avoid overheating. But 
as I can't hear the sound I might be totally off.

Björn Persson