You need an ESR meter to test bad caps. Leaking/ bad caps would have high E=
SR. Check for blue esr meter on the net.

John

--- On Tue, 11/10/09, Gordon Williams <gwilliams@ncf.ca> wrote:

> From: Gordon Williams <gwilliams@ncf.ca>
> Subject: Re: [EE]  Power Supply Health Question
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> Date: Tuesday, November 10, 2009, 7:39 AM
> =

> > > Could this be a sign that the power supply is
> starting to break down?
> Is
> > > the clicking sound from the transformer?
> > >
> > > Suggestions?
> > >
> >
> >=A0 =A0=A0=A0Leaky capacitors. Open the
> power supply and verify.
> >
> >=A0 =A0=A0=A0MJ
> >
> >
> There is a cluster of electrolitic caps at one end.=A0
> How would I test for
> leaky capacitors?
> =

> Gordon Williams
> =

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