We recently had an assembly where we set up a projector from a laptop. I had set up projectors a lot of times from VHS or DVD players, and knew all of the connections, how to keystone, change the settings on the projector, etc. But, I had the laptop hooked up to the projector using a serial cable, but the projector was getting no signal. I struggled with this for a while looking in the computer display preferences, trying to figure out how to get the laptop to send the signal over to the projector. After a while, another AV nerd walks up and presses a few keys on the keyboard, and out pops the picture. This got me thinking about how much I don't know about AV, and how I need to know more than I do when similar things happen. After setting up a laptop to a computer (Windows) what are the buttons you press to display it. (Ctrl -Something-?) Also, for a Mac laptop, if you have a serial adaptor, then is there a similar thing you have to do for that? I have seen a past TD struggle with setting up a Mac, and could only get the red channel for a while. If I am ever in the same situation, how do you fix that? Any other basic rules for getting the signal from a laptop, or computer to a projector? Any information would be helpful.