PC speaker hum

Sep 14, 2006 3 Replies


"Eeyore"


>
> >
> >
> > 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?
> >
> > See if there's a group for HP PCs ?
> >
> > This cerainly isn't an audio question.
> >
> > Graham
>
> It's not a HP, and I'm sorry if this is the wrong
> group but I figured that hum from a speaker is audio.
> I know this group is mainly concerned with hi-fi stuff
> but I don't know where else to ask.

sci.electronics.repair and sci.electronics.basics come to mind.


Please do crosspost and don't multipost btw.


Sod it, I'll do it myself.



Graham


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

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

- Mike

What, that little buzzer that does the "beep" when you start up? Sure, throw it away.

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