NEC LT25 User Manual page 59

Common Problems & Solutions (
Problem
Does not turn on
• Check that the power cable is plugged in and that the power button on the projector cabinet or the remote
• Ensure that the lamp cover is installed correctly. (
• Check to see if the projector has overheated. If there is insufficient ventilation around the projector or if the
• Check to see if the lamp usage exceeds 2100 hours (up to 2600 hours : Eco mode). If so, replace the lamp.
• The lamp may fail to light. Wait a full minute and then turn on the power again.
Will turn off
• Ensure that the Power Management or Off Timer is off. (
No picture
• Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Computer,
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. (
• Check to see if the image is muted. (
• Remove the lens cap.
• Reset the settings or adjustments to factory preset levels using the [Reset] in the Menu. (
• Enter your registered keyword if the Security function is enabled. (
• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning on
• See also the next page.
Picture suddenly • When one of the following happens, the Lamp mode automatically changes from Normal to Eco.
becomes dark
Color tone or hue is • Check if an appropriate color is selected in [Wall Color]. If not, select an appropriate option. (
unusual • Adjust [Hue] in [Picture]. (
Image isn't square to • Reposition the projector to improve its angle to the screen. (
the screen • Use the Keystone correction function to correct the trapezoid distortion. (
Picture is blurred • Make sure that focus is appropriate.
• Reposition the projector to improve its angle to the screen. (
• Ensure that the distance between the projector and screen is within the adjustment range of the lens. (
• Make sure that the distance between the focus sensor and the screen is within the effective range of the Auto
• Make sure that the requirements for the Auto Focus are met. (
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
Image is scrolling
• Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Video, S-
vertically, horizontally
or both • Adjust the computer image manually with the Horizontal and Vertical in the [Image Options]
Remote control does • Install new batteries. (
not work
• Make sure there are no obstacles between you and the projector.
• Stand within 22 feet (7 m) of the projector. (
Indicator is lit or
• See the POWER/STATUS/LAMP Indicator. (
blinking
Cross color in RGB
• Press the AUTO ADJ. button on the projector cabinet or the remote control. (
mode • Adjust the computer image manually with [Clock] and [Phase] in [Image Options]
For more information contact your dealer.
"Power/Status/Lamp Indicator" on page 50.)
Check These Items
control is on. ( page 16, 17)
room where you are presenting is particularly warm, move the projector to a cooler location.
After replacing the lamp, reset the lamp hours used.(
Video or S-Video). ( page 19) If there is still no picture, press the button again.
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.
* When there are no signals (blue or black screen)
source.
* When the room where you' re presenting is particularly warm
10)
Focus. ( page 22)
Should this happen, let the projector stand until there is no condensation on the lens.
Video or Computer). ( page 19)
Clock]. ( page 39)
page 8)
menu. ( page 39)
page 48)
page 45)
page 38)
page 28)
To return to the Normal mode, select another available
page 38)
page 8)
page 50)
51
page 43)
page 28)
Move the projector to a cooler location.
page 20, 21)
page 25)
page 20, 21)
page 22)
page 26)
[Position/Clock] in the
7. Appendix
page 45)
page 40)
page
[Position/