We have several types of data display projectors. The remote for the Barco in GA is a long thin one while the one for RH 244 is about the size of your hand. To turn the projectors on and off you use the Standby button. The sound systems both have several switches that need to be on in order to get sound. Selecting the number one on the Barco remote will give you the video input connection.
Chances are if the screen is black, the input needs to be changed to one.
If a computer is needed, there is a special box which connects to the computer in order to convert the computer signal and the input channel is 5. See Mark for more information on this. Davis Davis projectors are turned on and off using the zap button. There is a menu key that has the option of turning in off from there, please DO NOT USE this option. If someone cannot turn the projector off, make sure that the zap key is programed for power.