Thanks Jason but I'm afraid resetting the SMC has had no effect at all.

I should also mention that the Mac is incapable of making any noise
(including start-up chimes) and the Sound Effects preference panel is greyed
out and the input and output ones say that can't find any devices.

Philippe



2010/1/7 Jason Davies <[email protected]>

> I'd guess that resetting the SMC might help?
>
> http://support.apple.com/kb/HT3964?viewlocale=en_US
>
>
> On 7 Jan 2010, at 16:39, Philippe Chandless wrote:
>
> > I have no idea what to do next.
>
>
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