Optoma HD72 User Manual - Page 37

English Appendices Steady light => No light =>  If possible, turn off the projector, then unplug the power cord and wait at least 20 seconds before reconnecting power. Lamp burns out or makes a popping sound  When the lamp reaches its end of life, it will burn out and may make a loud popping sound. If this happens, the projector will not turn on until the lamp module has been replaced. To replace the lamp, follow the procedures in the "Replacing the Lamp" section on page 39. LED Problems LED lighting message Message Standby State (Input power cord) Standby/On LED (Green) Flashing Power on (warming) Lamp lighting Power off (Cooling) Error (Lamp fail) Error (Fan fail) Error (Over Temp.) Message Reminders  Fan failed: Temp-LED Lamp-LED Flashing  Over temperature: 37