On Sun, 2011-09-11 at 20:34 +0700, Andrew 'Dewa' B. Osmond wrote: > But when I press Fn + F7 to activate dual monitor between my notebook > and LCD Projector it goes to blank screen. FYI, the LCD Projector is > NEC but I don't know the series. In my limited experience with notebooks and laptops, I found that repeatedly pressing the keys works. The sequence I found was (not necessarily in this order) screen external device screen and external device Paul.