NEC LT240 User Manual page 125

TROUBLESHOOTING
Common Problems & Solutions
Problem
Does not turn on
No picture
Image isn't square to the
screen
Picture is blurred
Image is scrolling verti-
cally, horizontally or
both
Remote control does
not work
Indicator is lit or blink-
ing
Cross color in RGB
mode
USB mouse does not
work
Check These Items
• Check that the power cable is plugged in and that the power button on the projector
cabinet or the remote control is on. See pages E-36 and 37.
• Ensure that the lamp cover is installed correctly. See page E-120.
• Check to see if the projector has overheated or the lamp usage exceeds 1600 hours
(up to 2100 hours : Eco mode). If there is insufficient ventilation around the projec-
tor or if the room where you're presenting is particularly warm, move the projector
to a cooler location.
• Use the menu to select your source (RGB 1/2, Video, S-Video, Viewer or LAN). See
page E-40.
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. See page E-85.
• Remove the lens cap.
• Reset the settings or adjustments to factory preset levels using the Factory Default
in the Adjustment Menu. See page E-117.
• Reposition the projector to improve its angle to the screen. See page E-42 or 43.
• Use the 3DReform function to correct the trapezoid distortion. See page E-45.
• Adjust the focus. See page E-44.
• Reposition the projector to improve its angle to the screen. See page E-42 or 43.
• Ensure that the distance between the projector and screen is within the adjustment
range of the lens. See page E-22-26.
• 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.
• Use menus or Source button on the remote control or the cabinet to select the
source you want to input.
• Install new batteries. See page E-19.
• Make sure there are no obstacles between you and the projector.
• Stand within 22 feet (7 m) of the projector. See page E-20.
• Make sure that you are in the Projector mode and the PJ button lights in red. If not,
press the PJ button. See page E-53.
• See the Status Indicator on pages E-123 and 124.
• If Auto Adjust is off, turn it on or adjust the image manually with the Position/Clock
in the Image Options. See pages E-87, 88 and 98.
• Make sure that your USB mouse is properly connected to the projector.
The projector may not support some brands of a USB mouse.
E-125