Common Problems & Solutions - NEC PX750U2 User Manual

Common Problems & Solutions
(→ "Power/Status/Lamp Indicator" on page 229.)
Problem Check These Items
Does not turn on or • Check that the power cord is plugged in and that the power button on the projector cabinet or the remote control
shut down
• Ensure that the lamp cover is installed correctly. (→ page 184)
• Check to see if the projector has overheated. If there is insufficient ventilation around the projector or if the room
• Check to see if you continue to use the projector for another 100 hours after the lamp has reached the end of its
• 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
Will turn off • Ensure that the [OFF TIMER], [AUTO POWER OFF] or [PROGRAM TIMER] is off. (→ page 120, 131)
No picture • Check if the appropriate input is selected. (→ page 21) If there is still no picture, press the SOURCE button or one
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. (→ page 110)
• Ensure that the lens cover is open. (→ page 17)
• Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (→ page 137)
• Enter your registered keyword if the Security function is enabled. (→ page 44)
• If the HDMI input or the DisplayPort signal cannot be displayed, try the following.
• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning on
• See also the page 233�
Color tone or hue is • Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (→ page 118)
unusual • Adjust [HUE] in [PICTURE]. (→ page 110)
Image isn't square to • Reposition the projector to improve its angle to the screen. (→ page 22)
the screen • Use the Keystone correction function to correct the trapezoid distortion. (→ page 30)
Picture is blurred • Adjust the focus. (→ page 25)
• Reposition the projector to improve its angle to the screen. (→ page 22)
• 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 216)
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
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 supported
vertically, horizontally
or both • Adjust the computer image manually with the Horizontal/Vertical in the [IMAGE OPTIONS]. (→ page 112)
is on� (→ pages 14, 17, 18)
where you are presenting is particularly warm, move the projector to a cooler location�
life� If so, replace the lamp� After replacing the lamp, reset the lamp hours used� (→ page 137)
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 128)
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�
of the input 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�
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�
(→ page 213, 214, 215)
Should this happen, let the projector stand until there is no condensation on the lens�
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 128)
by the projector� (→ page 222)
231
9. Appendix