Try tapping the power button. If this doesn't work, holding down the power 
button for about 5 seconds will shut it down.
Terry

"Colin Cook" <colchemy@blueyonder.co.uk> wrote in message 
news:6v_Og.4913$wg.4831@fe1.news.blueyonder.co.uk...
> This machine shuts itself down, and will not be restarted by hitting a 
> key, moving the mouse etc. Any ideas how to wake it up?
> Thanks.
>