Common Problems & Solutions - NEC P452H User Manual

Common Problems & Solutions
(→ "POWER/STATUS/LAMP Indicator" on page 125.)
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 121)
• 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 4000 feet/1200
• In case it's hard to think the trouble is not caused on the above mentioned conditions, unplug the power
Will turn off • Ensure that the [OFF TIMER] or [AUTO POWER OFF] is off. (→ page 52, 62)
No picture • Check if the appropriate input is selected. (→ page 14) If there is still no picture, press the SOURCE button
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. (→ page 45)
• Check that the AV MUTE (image off) buttons are not pressed.
• Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (→ page 68)
• Enter your registered keyword if the Security function is enabled. (→ page 30)
• If the HDMI 1 IN or the HDMI 2 IN signal cannot be displayed, try the following.
• Signals may not be supported depending on the HDBaseT transmission device. IR and RS232C cannot be
• 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 45)
Image isn't square to • Reposition the projector to improve its angle to the screen. (→ page 16)
the screen • Use the Keystone correction function to correct the trapezoid distortion. (→ page 21)
Picture is blurred • Adjust the focus. (→ page 19)
• Reposition the projector to improve its angle to the screen. (→ page 16)
• Ensure that the distance between the projector and screen is within the adjustment range of the lens. (→
• Has the lens been shifted by an amount exceeding the guaranteed range? (→ page 73)
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned
control is on� (→ pages 11, 12)
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 68)
meters or higher� Using the projector at altitudes approximately 4000 feet/1200 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 59)
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�
cord from the outlet� Then wait 5 minutes before plugging it in again� (→ page 24)
or one of the source buttons again�
- Reinstall your driver for the graphics card built in your computer, or use the updated driver�
For reinstalling or updating your driver, refer to the user guide accompanied with your computer or
graphics card, or contact the support center for your computer manufacturer�
Install the updated driver or OS on your own responsibility�
We are not liable for any trouble and failure caused by this installation�
used in certain cases as well�
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 59)
51)
page 69)
on� Should this happen, let the projector stand until there is no condensation on the lens�
127
9. Appendix