Epson PowerLite 800F 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw Laser 3LCD Projector (White) - Manual (Page 254)

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Projector Light Status
The lights on the projector indicate the projector status and let you know when a problem occurs. Check
the status and color of the lights and look for a solution in the table here.
Note: If the Indicators setting in the Operation menu is Off , all lights are off under normal projection
conditions.
1 Power light
2 Status light
3 Laser light
4 Temp (temperature) light
Power light Status light Laser light Temp light Status and solution
Blue Blue Off Off Normal operation.