NEC VT676 VT47/470/575/670/676 UM - Page 61

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7. Appendix Common Problems & Solutions (See also "Power/Status/Lamp Indicator" on page 53.) Problem Does not turn on 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 Image is scrolling vertically, horizontally or both Remote control does not work Indicator is lit or blinking Cross color in RGB mode Check These Items • Check that the power cable is plugged in and that the power button on the projector cabinet or the remote control is on. See pages 20 and 21. • Ensure that the lamp cover is installed correctly. See page 51. • Check to see if the projector has overheated or the lamp usage exceeds 2100* hours (up to 3100* hours : Eco mode). If there is insufficient ventilation around the projector or if the room where you're presenting is particularly warm, move the projector to a cooler location. * VT575 and VT47: 3100 hours (up to 4100 hours in Eco mode). • The lamp may fail to light. Wait a full minute and then turn on the power again. • The lamp has reached the end of its usable life. Replace the lamp. • Ensure that the Power Management is off. See page 45. • Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Computer, Video or S-Video). See page 23. If there is still no picture, press the button again. • Ensure your cables are connected properly. • Use menus to adjust the brightness and contrast. See page 38. • Remove the lens cap. • Reset the settings or adjustments to factory preset levels using the "Default" in the Menu. See page 47. • Enter your registered keyword if the Security function is enabled. See page 42. • When using with a notebook PC, be sure to connect between the projector and the notebook PC before turning on the power to the notebook PC. In most cases signal cannot be output from RGB output unless the notebook PC is turned on after connecting with the projector. * 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. • When one of the following happens, the Lamp mode automatically changes from Normal to Eco. * When there are no signals (blue or black screen) → To return to the Normal mode, select another available source. * When the image is muted using the PIC-MUTE button on the remote control → Press the PIC-MUTE button again to return to the Normal mode. * When the room where you' re presenting is particularly warm → Move the projector to a cooler location. • Check if an appropriate color is selected in "Wall Color". If so, select an appropriate option. See page 37. • Adjust "Hue" in "Picture". See page 38. • Reposition the projector to improve its angle to the screen. See page 24. • Use the Keystone correction function to correct the trapezoid distortion. See page 26. • Adjust the focus. See page 25. • Reposition the projector to improve its angle to the screen. See page 24. • Ensure that the distance between the projector and screen is within the adjustment range of the lens. See pages 11 for VT676/VT670/VT575/VT470 and 12 for VT47. • 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. • Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Video, SVideo or Computer). See page 23. • Adjust the computer image manually with the Horizontal/Vertical in the "Advanced → Page 2". See page 45. • Install new batteries.See page 10. • Make sure there are no obstacles between you and the projector. • Stand within 22 feet (7 m) of the projector. See page 10. • See the POWER/STATUS/LAMP Indicator on page 53. • Press the AUTO ADJ. button on the projector cabinet or the remote control. See page 28. • When "Off" is selected in Auto Adjust, adjust the computer image manually with Clock/Phase in "Advanced → Page 2" in the menu. See pages 45 and 46. For more information contact your dealer. 54

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54
7. Appendix
Common Problems & Solutions
(See also "Power/Status/Lamp Indicator" on page
53
.)
Does not turn on
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
Image is scrolling
vertically, horizontally
or both
Remote control does
not work
Indicator is lit or
blinking
Cross color in RGB
mode
•
Check that the power cable is plugged in and that the power button on the projector cabinet or the remote
control is on. See pages
20
and
21
.
•
Ensure that the lamp cover is installed correctly. See page
51
.
•
Check to see if the projector has overheated or the lamp usage exceeds 2100* hours (up to 3100* hours : Eco
mode). If there is insufficient ventilation around the projector or if the room where you’re presenting is par-
ticularly warm, move the projector to a cooler location.
*
VT575 and VT47: 3100 hours (up to 4100 hours in Eco mode).
•
The lamp may fail to light. Wait a full minute and then turn on the power again.
•
The lamp has reached the end of its usable life. Replace the lamp.
•
Ensure that the Power Management is off. See page
45
.
•
Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Computer,
Video or S-Video). See page
23
. If there is still no picture, press the button again.
•
Ensure your cables are connected properly.
•
Use menus to adjust the brightness and contrast. See page
38
.
•
Remove the lens cap.
•
Reset the settings or adjustments to factory preset levels using the “Default” in the Menu. See page
47
.
•
Enter your registered keyword if the Security function is enabled. See page
42
.
•
When using with a notebook PC, be sure to connect between the projector and the notebook PC before turning
on the power to the notebook PC. In most cases signal cannot be output from RGB output unless the notebook
PC is turned on after connecting with the projector.
*
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.
•
When one of the following happens, the Lamp mode automatically changes from Normal to Eco.
*
When there are no signals (blue or black screen)
→
To return to the Normal mode, select another available
source.
*
When the image is muted using the PIC-MUTE button on the remote control
→
Press the PIC-MUTE button
again to return to the Normal mode.
*
When the room where you' re presenting is particularly warm
→
Move the projector to a cooler location.
•
Check if an appropriate color is selected in "Wall Color". If so, select an appropriate option. See page
37
.
•
Adjust "Hue" in "Picture". See page
38
.
•
Reposition the projector to improve its angle to the screen. See page
24
.
•
Use the Keystone correction function to correct the trapezoid distortion. See page
26
.
•
Adjust the focus. See page
25
.
•
Reposition the projector to improve its angle to the screen. See page
24
.
•
Ensure that the distance between the projector and screen is within the adjustment range of the lens. See
pages
11
for VT676/VT670/VT575/VT470 and
12
for VT47.
•
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.
•
Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Video, S-
Video or Computer). See page
23
.
•
Adjust the computer image manually with the Horizontal/Vertical in the “Advanced
→
Page 2”. See page
45
.
•
Install new batteries.See page
10
.
•
Make sure there are no obstacles between you and the projector.
•
Stand within 22 feet (7 m) of the projector. See page
10
.
•
See the POWER/STATUS/LAMP Indicator on page
53
.
•
Press the AUTO ADJ. button on the projector cabinet or the remote control. See page
28
.
•
When “Off” is selected in Auto Adjust, adjust the computer image manually with Clock/Phase in “Advanced
→
Page 2” in the menu. See pages
45
and
46
.
Problem
Check These Items
For more information contact your dealer.