A blinking projector screen can distract viewers completely to focus on the content. A constantly blinking red, orange, and green light on your Acer projector usually indicates some messages like replacing the lamp, overheating, or it is the time for cleaning the lamp, etc. If the blinking light is accompanied by the switching on or off the problem, then there can be an issue with the mainboard or ballast failure or there is a problem with the replacement fans.