RedOnRed wrote:
wrote in message
oups.com...
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.
[...]
I've been in IT for years now and something like this could be too numerous
things to mention and not really worth speculating about - certainly not
without seeing it.

It really is process of elimination, starting with the easiest most obvious
things. The casing, for example can vibrate, especially if something is
touching it. Electrical interference. The fan, etc, etc.

I visited one user recently who had logged a call saying her mouse wasn't
working. After noticing no lights or display on her PC it quickly turned out
it simply needed switching on! I'm not implying for one minute you are of
the same callibre, but some faults aren't always what they seem.

Thanks. And to everyone else. And apologies for earlier taking on an
attitute unbecoming of someone looking for help. I agree also that
there is no place for an assertion "it couldn't be X" until that has
been clearly proven.

When (and if) I ever locate the problem, I'll report back. Because of
the frequency, I (now) know I'm going to need a device like a
stethoscope to locate the sound. The quick rummage last night with the
case open revealed nothing because, as reported, I could hear nothing,
so there was little point in disconnecting anything.

In addition, given the list of DIY jobs to do around this house, it may
have to get a lot louder

I am backed up --- /and/ the viability of the backup has been verified
(well worth a thought).

Best regards,

Jon C.