I installed an upgrade copy of Vista Home Premium, as a 'clean' install on
my Motion LE 1600 -- all was well, and the sound worked fine.

I then re-installed Vista Home Premium as an upgrade, in order to be able to
activate Windows (it was an upgrade copy).

After the re-install the sound does not work. Device Manager shows that the
sound device is correctly installed and working. The driver shows as a Vista
driver -- the only problem is that there is no sound coming from the
speakers (or headphones).

Any ideas as to what might be wrong and how to fix it?

Many thanks! ~ jfc.

I had a similar problem with my LS800. As detailed at:
http://mobilepcwiki.com/mpc/index.ph..._Install_Notes

External speakers didn't work initially, although they worked fine under XP.
A Motion Knowledgebase article suggested installing the XP audio drivers,
and this restored sound from the speakers.
a.. After re-boot a message appeared "StacSysTray: Error initializing
Sigmatel Control Menu: (11) Automation error". This went away after
de-activating StacSysTray using Microsoft's Autoruns utility.
b.. The XP audio driver page says "Intellisonic Noise Cancellation
Software must be re-installed after installing this update. This can be done
from your local machine at this location:
C:\Windows\Motion\KnowlesAcoustics" but that file is gone after a clean
install and Motion's main driver page says "Speech Enhancement: Intellisonic
not available for Windows Vista".
"John Fuchs-Chesney" <jfc2002@earthlink.net> wrote in message
news:2FE8FA01-9009-469D-B114-74290F1E577D@microsoft.com...
> After the re-install the sound does not work. Device Manager shows that
> the sound device is correctly installed and working. The driver shows as a
> Vista driver -- the only problem is that there is no sound coming from the
> speakers (or headphones).