Epson Home Cinema PRO-UHD 5050UB HDR Pixel-Shift 4K UHD 3LCD Home Theater Projector - Manual (Page 148)

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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.
1 Status light
2 Lamp light
3 Temp light
4 Power light
Power light Status light Lamp light Temp light Status and solution
Off Off Off Off Standby or sleep mode
Blue Blue Off Off Normal operation