For what little it may be worth, what resolution settings were variously used? I've been involved in a couple of LCD projector group puzzlings (none QT movies, tho), and being sure the laptop resolution setting matched the projector's capability(-ies) made a difference. In one case, the projector was somewhat old, and needed 640X480 which the (new IBM) laptop couldn't produce. In your case, did you try different resolutions? (In other case, my showing my 700MHz 16VRAM then-OS10.1.4 iBook dancing through resolutions and connectors when noone else could get the projector to work was a major influence in 3 CSI grad students buying Macs within a year, 2 tiBooks and 1 12" alBook.) On Sat, 21 Jun 2003, Trevor J. Hutley wrote: . . . > during his presentation. When he ran it on his PC laptop, it was OK > on the laptop screen, but did not appear on the big projector screen. > > I said, let me try it with my Ti-500. So I connected my Ti-book to > the LCD projector, and my 'desktop' background was projected by the > LCD projector on to the big screen. > > His presentation and movie were on a CD. > When I launched the mpg movie (Quicktime 6.3) it apened and ran on > my Ti-book screen. > > However, it was not visible (nothing was except my desktop) on the big screen. > > Then another colleague put the CD in to his (3 year old) PC laptop, > opened the movie with QT5, and the movie ran fine on his screen and > was immediately viewable on the big screen as well. . . .