I got mac i7 iMac a n few months ago and rigged it to display on my Sony tv playing all my vids with VLC. Was very happy.
Since latest OSX SL update the external screen is no longer recognised so I dont even get an option to switch to that screen.
Hmmm.
Plugged and umplugged rebooted - nothing seems to work.
Any you folks had similar or can suggest a few ideas?

Ta
Graz0