I believe he is speaking abou the internal pc speaker not the sound card and
external speakers.

- Mike

wrote in message
oups.com...
Neil Green wrote:

This may be the wrong group but I figure
electronics
is kinda universal, and the good people here have
helped me before.
I have a constant high pitched hum coming from the
internal PC speaker, the one connected to the
motherboard.
The connector is oriented correctly.
At first it was intermittent but now is constant,
so
I've pulled the lead off to disable the speaker.
The PC is running perfectly, and I can't find any
information on this problem with Google, except
that
apparently a batch of HP computers (which this one
isn't) apparently had a similar problem caused by a
leaky rectifier on the motherboard.
Does anyone have any ideas?

Most common cause is the audio ground connection coming adrift in the
connecting lead/plugs/sockets, in the lead from pc to speakers. A
multimeter will check this lead. Much less common is a bad suppply
electrolytic.

NT