Common problems &solutions, Appendx – NEC NP41 User Manual
Page 86
77
8. Appendx
Common Problems & Solutons (
→ "Power/Status/Lamp Indicator" on page
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
• Ensure that the lamp cover is installed correctly. (
→ page
• Ensure that the two screws on the lamp housing are completely tightened.(
→ page
• Ensure that the cooling pump is installed correctly. (
→ page
• 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 100 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
• 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 5000 feet/1500 meters
or higher. Using the projector at altitudes approximately 5000 feet/1500 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
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] or [AUTO POWER OFF] is off. (
→ page
No picture
• Use the appropriate source button on the remote control to select your source. (
→ page
) If there is still no pic-
ture, press the button again.
• Ensure your cables are connected properly.
• Use menus to adjust the contrast and brightness. (
→ page
• Check to see if the image is muted. (
→ page
• Remove the lens cap.
• Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (
→ page
• Enter your registered keyword if the SECURITY function is enabled. (
→ page
• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning 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.
Picture suddenly becomes
dark
• When one of the following happens, the [LAMP MODE] automatically changes from [NORMAL] to [ECO].
* When there are no signals (blue or black screen)
→ To return to the NORMAL mode, select another available
source.
* When the room where you' re presenting is particularly warm
→ Move the projector to a cooler location.
Color tone or hue is unusu-
al
• Check if an appropriate color is selected in [WALL COLOR]. If not, select an appropriate option. (
→ page
• Adjust [HUE] in [ADJUST]
→ [BASIC]. (→ page
Image isn’t square to the
screen
• Reposition the projector to improve its angle to the screen. (
→ page
• Use the KEYSTONE correction function to correct the trapezoid distortion. (
→ page
Picture is blurred
• Make sure that focus is appropriate.
• Reposition the projector to improve its angle to the screen. (
→ page
• Ensure that the distance between the projector and screen is within the adjustment range of the lens. (
→ page
• Make sure that the distance between the focus sensor and the screen is within the effective range of the AUTO
FOCUS. (
→ page
• Make sure that the requirements for the AUTO FOCUS are met. (
→ page
• 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 screen
• Set [FAN MODE] to other than [HIGH ALTITUDE] mode when using the projector at altitudes approximately 5000
feet/1500 meters or lower. Using the projector at altitudes less than approximately 5000 feet/1500 meters and setting
to [HIGH ALTITUDE] can cause the lamp to overcool, causing the image to flicker. Switch [FAN MODE] to [AUTO].
(
→ page
Image is scrolling verti-
cally, horizontally or both
• Use the appropriate source button on the remote control to select your source. (
→ page
• Adjust the computer image manually with the [HORIZONTAL] and [VERTICAL] in [ADJUST]
→ [IMAGE OPTIONS]
in the menu. (
→ page
Remote control does not
work
• Install new batteries. (
→ page
• Make sure there are no obstacles between you and the projector.
• Stand within 22 feet (7 m) of the projector. (
→ page
Indicator is lit or blinking
• See the POWER/STATUS/LAMP Indicator. (
→ page
Cross color in RGB mode
• Press the AUTO ADJ. button on the remote control (SELECT
◀ button on the projector cabinet). (→ page
• Adjust the computer image manually with [CLOCK] and [PHASE] in [ADJUST]
→ [IMAGE OPTIONS] in the menu. (→
page
For more information contact your dealer.