My church has a Dell 2300 projector. I am trying to play a power point presentation that has MPEG files in it. When the presentation gets to the slide with the MPEG file the projector screen goes white with the Dell logo on it and a few seconds later you see the video on the screen. The file is playing on the computer screen but does not play until this white screen goes off. I am not sure if this is a computer problem or a projector problem. I am using a Dell laptop. Thanks to anyone that can help.