Just a guess, but maybe the sound is that from your screen?
> Hi!
>
> I just joined the list, and have a newly-purchased duo 2300c which
> I plan to start using instead of my old trusty Duo 230 (since one of
> the programs I use requires a PPC processor).
>
> Since the duo 2300 is under warrantee for another 25 days or so,
> I'm evaluating it very carefully so that I'll find out its problems
> within this time. There are several things I may want to ask about,
> but for now I will ask just about one of them.
>
> When I run the duo off of a ram disk (which would be my _usual_
> way of working, since I appreciate the peace and quiet you
> can have while using a ram disk) I notice a high pitched whistling
> sound which continues the whole time I work.
>
> The whistling sound is kind of like a kettle -- sort of wavery. It's
> not exactly _loud_, (in fact it may be that some people wouldn't
> be bothered by it. And if I run the duo from its harddrive instead
> of a ram disk, there is so much other noise that it masks the whistling
> sound. ).
>
> The whistling is not changed by changing the volume of the speaker,
> or even turning it down to zero. It seems that the sound does
> come from the area of the speaker (where the holes are under
> the screen) and when I put a peice of tape over the holes, the
> sound is much quieter but still there.
>
> It's a very noticable and disturbing sound to me, and I wonder
> whether this is a common condition and whether it's fixable
> (My duo 230 didn't have it.).
>
> Thanks for any info or advice.
>
> Susanna
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