Common Problems & Solutions - NEC UM352W User Manual

Common Problems & Solutions
(→ "Power/Status/Lamp Indicator" on page 122.)
Problem Check These Items
Does not turn on • Check that the power cord is plugged in and that the power button on the projector cabinet or the remote
or shut down
• Ensure that the lamp cover is installed correctly. (→ page 118)
• Check to see if the projector has overheated. If there is insufficient ventilation around the projector or if the
• Check to see if you continue to use the projector for another 100 hours after the lamp has reached the end
• 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/1700
Will turn off • Ensure that the [OFF TIMER] or [AUTO POWER OFF] is off. (→ page 59, 68)
No picture • Use the COMPUTER1, HDMI1/MHL, HDMI2, VIDEO, USB-B, or APPS button on the remote control to select
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. (→ page 52)
• Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (→ page 74)
• Enter your registered keyword if the Security function is enabled. (→ page 35)
• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning
• See also the
Picture suddenly • Check if the projector is in the Forced ECO mode because of too high ambient temperature. If this is the
becomes dark
Color tone or hue is • Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (→ page
unusual
• Adjust [HUE] in [PICTURE]. (→ page 52)
Image isn't square to • Reposition the projector to improve its angle to the screen. (→ page 17, 18)
the screen • Use the Keystone correction function to correct the trapezoid distortion. (→ page 21)
Picture is blurred • Adjust the focus. (→ page 18)
• Reposition the projector to improve its angle to the screen. (→ page 17, 18)
• Ensure that the distance between the projector and screen is within the adjustment range of the projection
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned
Flicker appears on • Set [FAN MODE] to other than [HIGH ALTITUDE] mode when using the projector at altitudes approximately 5500
screen
Image is scrolling • Check the computer's resolution and frequency. Make sure that the resolution you are trying to display is
vertically, horizontally
or both • Adjust the computer image manually with the Horizontal/Vertical in the [IMAGE OPTIONS]. (→ page 54)
Remote control does • Install new batteries.(→ page 10)
not work • Make sure there are no obstacles between you and the projector.
• Stand within 22 feet (7 m) of the projector. (→ page 10)
Indicator is lit or • See the POWER/STATUS/LAMP Indicator. (→ page 122)
blinking
control is on� (→ pages 13, 14)
room where you are presenting is particularly warm, move the projector to a cooler location�
of its life� If so, replace the lamp� After replacing the lamp, reset the lamp hours used� (→ page 116)
meters or higher� Using the projector at altitudes approximately 5500 feet/1700 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 65)
If you turn on the projector immediately after the lamp is turned off, the fans run without displaying an
image for some time and then the projector will display the image� Wait for a moment�
your source (COMPUTER, HDMI1/MHL, HDMI2, VIDEO, USB-B, or APPS)� (→ page 16) If there is still no
picture, press the button again�
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�
next page�
case, lower the internal temperature of the projector by selecting [HIGH] for [FAN MODE]� (→ page 65)
59)
window� (→ page 75)
on� Should this happen, let the projector stand until there is no condensation on the lens�
feet/1700 meters or lower� Using the projector at altitudes less than approximately 5500 feet/1700 meters and setting
to [HIGH ALTITUDE] can cause the lamp to overcool, causing the image to flicker� Switch [FAN MODE] to [AUTO]�
(→ page 65)
supported by the projector� (→ page 131)
124
9. Appendix