Common Problems & Solutions. NEC P502H, P502W, P452H, P452W

9. Appendix

Common Problems & Solutions

( → “POWER/STATUS/LAMP Indicator” on page

125

.)

Problem Check These Items

Does not turn on or shut down

Will turn off

No picture

Picture suddenly becomes dark

Color tone or hue is unusual

Image isn’t square to the screen

Picture is blurred

• Check that the power cord is plugged in and that the power button on the projector cabinet or the remote control is on� ( → pages

11 ,

12 )

• 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 room where you are presenting is particularly warm, move the projector to a cooler location�

• Check to see if you continue to use the projector for another 100 hours after the lamp has reached the end of its life� If so, replace the lamp� After replacing the lamp, reset the lamp hours used� (

→ page 68 )

• 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 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�

• In case it’s hard to think the trouble is not caused on the above mentioned conditions, unplug the power cord from the outlet� Then wait 5 minutes before plugging it in again� ( → page

24

)

• Ensure that the [OFF TIMER] or [AUTO POWER OFF] is off. (

→ page 52 ,

62 )

• Check if the appropriate input is selected. (

→ page 14 ) If there is still no picture, press the SOURCE button

or one of the source buttons again�

• 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.

- 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�

• Signals may not be supported depending on the HDBaseT transmission device. IR and RS232C cannot be used in certain cases as well�

• Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning 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 screensaver or power management software�

• See also the

next page

�

• Check if the projector is in the Forced ECO mode because of too high ambient temperature. If this is the case, lower the internal temperature of the projector by selecting [HIGH] for [FAN MODE]� ( → page

59

)

• Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. ( → page

51

)

• Adjust [HUE] in [PICTURE]. ( → page

45 )

• Reposition the projector to improve its angle to the screen. (

→ page 16

)

• Use the Keystone correction function to correct the trapezoid distortion. ( → page

21 )

• 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. ( → page

69 )

• 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 on� Should this happen, let the projector stand until there is no condensation on the lens�

127