NEC NP-P452H Users Manual - Page 138

Common Problems & Solutions, Check These Items

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9. Appendix Common Problems & Solutions (→ "POWER/STATUS/LAMP Indicator" on page 125.) Problem Check These Items Does not turn on or shut down • 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) 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 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. Picture suddenly becomes dark • 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) Color tone or hue is unusual • Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (→ page 51) • 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. (→ 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

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127
9. Appendix
Common Problems & Solutions
(
→
“POWER/STATUS/LAMP Indicator” on page
125
.)
Problem
Check These Items
Does not turn on
or shut down
•
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
)
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
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 screen-
saver or power management software�
•
See also the
next page
�
Picture suddenly
becomes dark
•
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
)
Color tone or hue is
unusual
•
Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (
→
page
51
)
•
Adjust [HUE] in [PICTURE]. (
→
page
45
)
Image isn’t square to
the screen
•
Reposition the projector to improve its angle to the screen. (
→
page
16
)
•
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. (
→
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�