NEC LT75Z user manual Troubleshooting, Power/Status Light Messages, Common Problems & Solutions

5. TROUBLESHOOTING

This section helps you resolve problems you may encounter while setting up or using the projector.

Power/Status Light Messages

Condition	Power Indicator	Status Indicator	Note
Standby	Steady orange	–	–
Cooling down	Blinking green	–	Blinks green for 90 seconds
Lamp in Normal mode	Steady green	–	–
Lamp in Eco mode	Steady green	Steady green	–
Retrying to turn on lamp	Steady green	Blinking orange	The projector retries 3 times at an interval of 15
			sec for max. 45 sec)
One minute after lamp is turned	Blinking green	No light in Normal mode / Steady	–
on		green in Eco mode
Lamp has reached its end of life	Steady green	Steady red	Message appears on screen during 1000-1100
(Normal: 1000 hours or over)			hours (1500-1600 hours: Eco mode) of lamp us-
(Eco: 1500 hours or over)			age. The projector reaches its end of life. Please
			replace the lamp as soon as possible
Lamp life has reached its end of	Steady orange	Steady red	The projector is in standby mode and cannot
life			be turned on.
(Normal: 1100 hours or over)
(Eco: 1600 hours or over)
Lamp cover error	Steady orange	Blinking red (1 sec interval)	The projector is in standby mode and cannot
			be turned on.
Temperature error	Steady orange	Blinking red (4 sec interval)	The projector is in standby mode and cannot
			be turned on.
Fan error	Steady orange	Blinking red (8 sec interval)	The projector is in standby mode and cannot
			be turned on.
Lamp error	Steady orange	Blinking red (12 sec interval)	The projector is in standby mode and cannot
			be turned on.

Common Problems & Solutions

Problem	Check These Items
Does not turn on	• Check that the power cable is plugged in and that the power button on the projector cabinet or the
	remote control is on.
	• Ensure that the lamp cover is installed correctly. See page E-34.
	• Check to see if the projector has overheated or the lamp usage exceeds 1100 hours. If there is insuffi-
	cient ventilation around the projector or if the room where you’re presenting is particularly warm, move
	the projector to a cooler location.
No picture	• Use the menu to select your source (Video, S-Video or RGB). See page E-27.
	• Ensure your cables are connected properly.
	• Use menus to adjust the brightness and contrast. See page E-27.
	• Remove the lens cap.
	• Reset the settings or adjustments to factory preset levels using the Factory Default in the Adjustment
	Menu. See page E-29.
Image isn’t square to the screen	• Reposition the projector to improve its angle to the screen. See page E-22.
	• Use the Keystone in the Adjustment Menu to correct the trapezoid distortion. See page E-27.
Picture is blurred	• Adjust the focus. See page E-22.
	• Reposition the projector to improve its angle to the screen. See page E-22.
	• Ensure that the distance between the projector and screen is within the adjustment range of the lens.
	See page E-14.
Image is scrolling vertically, hori-	• Use menus or Source button on the remote control or the cabinet to select the source you want to input.
zontally or both
Remote control does not work	• Install new batteries. See page E-13.
	• Make sure there are no obstacles between you and the projector.
	• Stand within 22 feet (7 m) of the projector. See page E-13.
Status indicator is lit or blinking	• See the Status Light messages above.
Cross color in RGB mode	• If Auto Adjust is off, turn it on. If Auto Adjust is on, turn it off and balance the image with the Position/
	Clock in the Image Options. See page E-29 or E-32.

E-35