NEC NP901W user manual 129, Appendix, For more information contact your dealer

	8. Appendix
Common Problems & Solutions (→ “Power/Status/Lamp Indicator” on page 128)
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. (→ page 21, 22)
	• Ensure that the lamp cover is installed correctly. (→ page 127)
	• Check to see if the projector has overheated. If there is insufficient ventilation around the projector or if the
	room where you are presenting is particularly warm, move the projector to a cooler location.
	• Check to see if you continue to use the projector for another 600 hours after the lamp has reached the end
	of its life. If so, replace the lamp.
	After replacing the lamp, reset the lamp hours used. (→ page 121)
	• The lamp may fail to light. Wait a full minute and then turn on the power again.
	• Set [FAN MODE] to [HIGH ALTITUDE] when using the projector at altitudes approximately 5500 feet/1600
	meters or higher. Using the projector at altitudes approximately 5500 feet/1600 meters or higher without
	setting to [HIGH ALTITUDE] can cause the projector to overheat and the projector could shut down. If this
	happens, wait a couple minutes and turn on the projector. (→ page 115)
	Also when the lamp is turned off, the projector internal temperature is hot. If the power is turned on before
	the projector has cooled down, the fan will run a short time before the lamp will turn on.
Will turn off	• Ensure that the [OFF TIMER], [PROGRAM TIMER] or [AUTO POWER OFF] is off. (→ page 90, 115)
No picture	• Use the SOURCE button on the projector cabinet or the VIDEO, the S-VIDEO, the COMPUTER 1, the COM-
	PUTER 2, the HDMI, the VIEWER or the NETWORK button on the remote control to select your source. (→
	page 24)
	• Ensure your cables are connected properly.
	• Use menus to adjust the brightness and contrast. (→ page 80)
	• Check to see if the image is muted. (→ page 33)
	• Remove the lens cap.
	• Reset the settings or adjustments to factory preset levels using the Reset in the Menu. (→ page 121)
	• Enter your registered keyword if the Security function is enabled. (→ page 43)
	• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turn-
	ing on the power to the notebook PC.
	In most cases the output signal from the notebook PC is not turned on unless connected to the projector
	before being powered up.
	* If the screen goes blank while using your remote control, it may be the result of the computer’s screen-
	saver or power management software.
	• See also the next page.
Color tone or hue is	• Check if an appropriate color is selected in [Wall Color]. If not, select an appropriate option. (→ page 89)
unusual	• Adjust [Hue] in [Adjust]. (→ page 80)
Image isn’t square to	• Reposition the projector to improve its angle to the screen. (→ page 25)
the screen	• Use the 3DReform function to correct the trapezoid distortion. (→ page 28)
Picture is blurred	• Adjust the focus. (→ page 26)
	• Reposition the projector to improve its angle to the screen. (→ page 25)
	• Ensure that the distance between the projector and screen is within the adjustment range of the lens. (→
	page 136)
	• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned
	on. Should this happen, let the projector stand until there is no condensation on the lens.
Flicker appears on	• Set [FAN MODE] to other than [HIGH ALTITUDE] mode when using the projector at altitudes approximately
screen	5500 feet/1600 meters or lower. Using the projector at altitudes less than approximately 5500 feet/1600
	meters and setting to [HIGH ALTITUDE] can cause the lamp to overcool, causing the image to flicker.
	Switch [FAN MODE] to [AUTO]. (→ page 115)
Image is scrolling	• Use the SOURCE button on the projector cabinet or the VIDEO, the S-VIDEO, the COMPUTER 1, the COM-
vertically, horizontally or	PUTER 2, the HDMI, the VIEWER or the NETWORK button on the remote control to select your source (Video,
both	S-Video, Computer, Component, Viewer or NETWORK). (→ page 24)
	• Adjust the computer image manually with the [Clock]/[Phase] in [Adjust] → [Image Options]. (→ page 81)
Remote control does	• Install new batteries. (→ page 9)
not work	• Make sure there are no obstacles between you and the projector.
	• Stand within 22 feet (7 m) of the projector. (→ page 9)
	• Check if one or more remote sensors are enabled. Select [Setup] → [Installation] → [Remote Sen-
	sor] from the menu. (→ page 113)
	• Make sure that the remote control’s ID corresponds with the projector’s ID.
Indicator is lit or blink-	• See the POWER/STATUS/LAMP Indicator. (→ page 128)
ing
Vertical stripes in RGB	• Press the AUTO ADJUST button on the projector cabinet or the AUTO ADJ. button on the remote control. (→
mode	page 30)
	• Adjust the computer image manually with the [Clock]/[Phase] in [Adjust] → [Image Options]. (→ page 81)
USB mouse does not	• Make sure that your USB mouse is properly connected to the projector. (→ page 35)
work	The projector may not support some brands of a USB mouse.

•Some menu items cannot be operated with a USB mouse.

For more information contact your dealer.

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