This means there is a connection error between your Smart Board and your Computer. 99% of the time this is due to either an unplugged USB cable which simply needs plugged back in or loss in communication at which...
Your Projector or Smart Board blinks orange for about 20-30 seconds then turns green or blinks green and the screen stays black. This typically happens when either 1) a projector bulb has gone bad or 2) the fan...