Common Problems & Solutions - NEC PA721X User Manual

Common Problems & Solutions
(→ "Power/Status/Lamp Indicator" on page 214.)
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 161)
• 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/1600
Will turn off • Ensure that the [OFF TIMER], [AUTO POWER OFF] or [PROGRAM TIMER] is off. (→ page 101, 111)
No picture • Check if the appropriate input is selected� (→ page 16) 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 93)
• Ensure that the lens cover is open. (→ page 14)
• Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (→ page 116)
• Enter your registered keyword if the Security function is enabled. (→ page 37)
• 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
• See also the page 218�
Picture suddenly • Check if the projector is in the Forced ECO mode because of too high ambient temperature. If this is the case,
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 93)
Image isn't square to • Reposition the projector to improve its angle to the screen. (→ page 17)
the screen • Use the Keystone correction function to correct the trapezoid distortion. (→ page 22)
Picture is blurred • Adjust the focus. (→ page 19)
• Reposition the projector to improve its angle to the screen. (→ page 17)
• 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 205)
• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
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/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)
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�
or one 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�
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�
lower the internal temperature of the projector by selecting [HIGH] for [FAN MODE]� (→ page 108)
101)
(→ page 201)
Should this happen, let the projector stand until there is no condensation on the lens�
203
9. Appendix