The teaching stations have a fairly standard setup across the board; main campus and other satellite locations. A few locations do not have a VGA duplicator, but most do. If it does not then the tower computer is connected directly with a VGA cable from the tower to projector and a DVI cable from the tower to the monitor. This is more rare. The standard cable diagram with the VGA duplicator is shown below:
If the image is not on appearing on either device (monitor or projector):
- Is the computer tower on (led’s blinking, etc.)
- Are the devices powered on? (Projector has a blue screen, monitor says no signal, etc.)
- Is the lead VGA cable from the tower to the VGA duplicator connected on both ends?
- Is the VGA duplicator powered on? (LED is lit, plug is plugged in to both power strip and the box)
If the above clear check, then try
- unplug and replug the power on the duplicator
- try connecting the monitor directly to the tower
- try connecting the projector directly to the tower
BE SURE TO PLUG THINGS BACK IN SO FUTURE TESTING IS ACCURATE
If the image is only absent from one of the displays:
- Is the failing device powered on? (Projector has a blue screen, monitor says no signal, etc.)
- Has someone bypassed the duplicator and plugged the working device into the tower directly?
- Is the failed device properly plugged into the duplicator?
If the above clear check, then try
- Switch the VGA outputs on the duplicator with each other (is the one feed good and one bad or is the working device still working and the other blank?)
- plug the failing devices VGA cable directly into the tower (does it work then? Try reconnecting it to the duplicator; does it work now?)
BE SURE TO PLUG THINGS BACK IN SO FUTURE TESTING IS ACCURATE