NEC PA721X User Manual page 216

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
vertically, horizontally
or both • Adjust the computer image manually with the Horizontal/Vertical in the [IMAGE OPTIONS]. (→ page 95)
Remote control does • Install new batteries.(→ page 9)
not work • Make sure there are no obstacles between you and the projector.
• Stand within 22 feet (7 m) of the projector. (→ page 9)
• To perform computer mouse operations using the projector's remote control, connect the optional mouse
Indicator is lit or • See the POWER/STATUS/LAMP Indicator. (→ page 214)
blinking
Cross color in RGB • Press the AUTO ADJ. button on the projector cabinet or the remote control. (→ page 24)
mode • Adjust the computer image manually with [CLOCK]/[PHASE] in [IMAGE OPTIONS] in the menu. (→ page
For more information contact your dealer.
feet/1600 meters or lower� Using the projector at altitudes less than approximately 5500 feet/1600 meters and setting
to [HIGH ALTITUDE] can cause the lamp to overcool, causing the image to flicker� Switch [FAN MODE] to [AUTO]� (→
page 108)
supported by the projector� (→ page 207)
receiver to the computer� (→ page 30)
94)
204
9. Appendix