Phil Anthropist wrote:
wrote:
My PC (Dell Precision 370, about 14 months old) is emitting a high
pitched tone; I'd say between 8 and 12 KHz but that is a guess; that
guess based on recall of acoustic-coupler modems. Loud enough to be
annoying; hardly loud enough do much about.

It is not the (19 inch flat analogue, not CRT) screen and I have
isolated other items like USB disks.

Reluctantly, I switched the machine off and the noise disappeared. The
[...]

Make a simple stethoscope from a 30 to 50cm length of garden hose or similar
(with or without a small funnel attached) then listen to the various bits
until you pin-point the source of the whine.

Thanks, yes I guess that's what I need. Following comments of others, I
had the box open; could hear nothing.

Thanks,

Jon C.