Common Problems & Solutions - NEC PA723U User Manual

Common Problems & Solutions
(→ "Power/Status/Lamp Indicator" on page 180.)
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 control
or shut down
• Ensure that the lamp cover is installed correctly. (→ page 158)
• Check to see if the projector has temperature error, If projector inside temperature is too hot or cool, it disabled to
• 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 meters
Will turn off • Ensure that the [OFF TIMER], [AUTO POWER OFF] or [PROGRAM TIMER] is off. (→ page 119, 133)
No picture
• Check if the appropriate input is selected. (→ page 19) If there is still no picture, press the INPUT button or one of
• Ensure your cables are connected properly.
• Use menus to adjust the brightness and contrast. (→ page 90)
• 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 134)
• Enter your registered keyword if the Security function is enabled. (→ page 43)
• If the HDMI input or the DisplayPort signal cannot be displayed, try the following.
• The signal may not be supported depending on the HDBaseT transmission device. In addition, RS232C interface
• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning on the
• See also the page 187�
Picture suddenly • Check if the projector is in the Forced ECO mode because of too high ambient temperature. If this is the case, lower
becomes dark
Color tone or hue is • Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (→ page 115)
unusual
• Adjust [HUE] in [PICTURE]. (→ page 91)
Image isn't square to • Reposition the projector to improve its angle to the screen. (→ page 21)
the screen
• Perform [GEOMETRIC CORRECTION] when the trapezoid is distorted. (→ page 103)
Picture is blurred • Adjust the focus. (→ page 23)
• Reposition the projector to improve its angle to the screen. (→ page 21)
• 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 167)
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on. Should
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 92)
Remote control does
• Install new batteries. (→ page 12)
not work • Make sure there are no obstacles between you and the projector.
• Stand within 40 m/1575 inch of the projector. (→ page 13)
Indicator is lit or • See the POWER/STATUS/LAMP Indicator. (→ page 180)
blinking
is on� (→ pages 15, 17)
turn on the projector as the protection� Wait for a moment and try turn on the projector again�
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 115)
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�
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�
may not be supported�
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�
the internal temperature of the projector by selecting [HIGH] for [FAN MODE]� (→ page 115)
(→ page 162)
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 115)
by the projector� (→ page 169)
185
8. Appendix