On Sun, Jul 08, 2007 at 12:41:55AM -0400, Tim Hull wrote:
The most likely source of a noise as you seem to describe is a
ceramic capacitor. An alternative is some coil, but that you
usually only hear in cases where a high frequency is used inside
a voltage convertor (in order to reduce transformator or coil
sizes) and I doubt that anything like that is possible in a
laptop... I'd have the hear the actual sound to know what it is.
99% chance it's a ceramic capacitor that has to absorb some
pulsed current.
If you'd replace the capacitor with another one of a different
type (same capacity, of course), for example a styroflex one,
then the noise would go away. It's very difficult to find out
which it is however ;). The only method that I know is by
touching each capacitor (ie with pliers) while it is making noise,
which will cause the sound to change a little if you have the
right one.
--
Carlo Wood <carlo@alinoe.com>
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