[QUOTE=Natja-ss-1334|May 21, 2006 6:40:11 AM] What ever the cause is this usually demonstrates a weak signal or a signal the unit cannot handle like trying to run a refresh rate and or resolution the projector cannot display from a PC. I believe this model has options within the projector menus for vga port to adjust synching when that port is in use. Or am I incorrect? for VGA a lengthy cable usually is not a problem. I run a 60 footer with no trouble. Of course be certain that the cable it's self is not damaged and connections are solid and tight at both ends. [/QUOTE] Thanks Natja-ss-1334. The projector does have menus for setting RGB via the vga port to adjust synching when that port is in use - and that is part of the problem I think - the menu does not become available until that port is in use - I.e. I can not adjust any settings for RGB because the projector has not detected / or locked onto the RGB signals, so that option is not presented. Also, it seems the main menu is not available until a valid source is connected!