reason 1: if the projector is connected with equipment, it may be a signal transmission problem. Reason 2: Projector bulb aging or failure. Reason 3: The LCD panel of the projector is aging. Reason 4: The lens in the projector light path is burnt out.

The glass inside the projector is burnt and discolored. You should immediately turn off the projector and send it to a special repair shop to replace it with a new transparent glass. The lens of the projector has high-definition transparent glass as the display function of the lens. In this way, the projected picture is very clear and the color is realistic. If the glass is burnt after long-term use, it can only be used by replacing it with a new one.