NEC VT800 User Manual page 133

Common Problems & Solutions (→ "Power/Status/Lamp Indicator" on page 120)
problem
Does not turn on
Will turn off
No picture
Color tone or hue is
unusual
Image isn't square to
the screen
Picture is blurred
Flicker appears on
screen
Image is scrolling
vertically, horizontally or
both
Remote control does
not work
Indicator is lit or blink-
ing
Vertical stripes in RGB
mode
USB mouse does not
work
For more information contact your dealer.
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. (→ page 19, 20)
• Ensure that the lamp cover is installed correctly. (→ page 119)
• 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 113)
• 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 108)
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.
• Ensure that the Auto Power Off, Off Timer is off. (→ page 87, 108)
• 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 22)
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. (→ page 77)
• Check to see if the image is muted. (→ page 31)
• Remove the lens cap.
• Reset the settings or adjustments to factory preset levels using the Reset in the Menu. (→ page 113)
• Enter your registered keyword if the Security function is enabled. (→ page 41)
• 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.
• Check if an appropriate color is selected in [WALL COLOR]. If not, select an appropriate option. (→ page 86)
• Adjust [HUE] in [ADJUST]. (→ page 77)
• Reposition the projector to improve its angle to the screen. (→ page 23)
• Use the 3DReform function to correct the trapezoid distortion. (→ page 26)
• Adjust the focus. (→ page 24)
• Reposition the projector to improve its angle to the screen. (→ page 23)
• Ensure that the distance between the projector and screen is within the adjustment range of the lens. (→
page 126)
• 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.
• Set [FAN MODE] to other than [HIGH ALTITUDE] mode when using the projector at altitudes approximately
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 108)
• 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 (Video,
S-Video, Computer, Component, Viewer or NETWORK). (→ page 22)
• Adjust the computer image manually with the [CLOCK]/[PHASE] in [ADJUST] → [IMAGE OPTIONS]. (→ page 78)
• Install new batteries. (→ page 9)
• 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 106)
• Make sure that the remote control's ID corresponds with the projector's ID.
• See the POWER/STATUS/LAMP Indicator. (→ page 120)
• Press the AUTO ADJUST button on the projector cabinet or the AUTO ADJ. button on the remote control. (→
page 28)
• Adjust the computer image manually with the [CLOCK]/[PHASE] in [ADJUST] → [IMAGE OPTIONS]. (→ page 78)
• Make sure that your USB mouse is properly connected to the projector. (→ page 33)
The projector may not support some brands of a USB mouse.
• Some menu items cannot be operated with a USB mouse.
11
8. Appendix