NEC NP-UM351W User's Manual - Page 140

8. Appendix Common Problems & Solutions (→ "Power/Status/Lamp Indicator" on page 128.) 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 13, 14) • Ensure that the lamp cover is installed correctly. (→ page 124) • 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 122) • 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/1700 meters or higher. Using the projector at altitudes approximately 5500 feet/1700 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 92) 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. Will turn off • Ensure that the [OFF TIMER] or [AUTO POWER OFF] is off. (→ page 88, 95) No picture • Use the COMPUTER1, HDMI1/MHL, HDMI2, VIDEO, USB-A, USB-B or LAN button on the remote control to select your source (COMPUTER, HDMI1/MHL, HDMI2, VIDEO, USB-A, LAN or USB-B). (→ page 16) If there is still no picture, press the button again. • Ensure your cables are connected properly. • Use menus to adjust the brightness and contrast. (→ page 80) • Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (→ page 102) • Enter your registered keyword if the Security function is enabled. (→ page 33) • 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 be- • Check if the projector is in the Forced ECO mode because of too high ambient temperature. If this is the case, comes dark lower the internal temperature of the projector by selecting [HIGH] for [FAN MODE]. (→ page 92) Color tone or hue is un- • Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (→ page 87) usual • Adjust [HUE] in [PICTURE]. (→ page 80) Image isn't square to the • Reposition the projector to improve its angle to the screen. (→ page 17, 18) screen • Use the Keystone correction function to correct the trapezoid distortion. (→ page 21) Picture is blurred • Adjust the focus. (→ page 18) • Reposition the projector to improve its angle to the screen. (→ page 17, 18) • Ensure that the distance between the projector and screen is within the adjustment range of the projection window. (→ page 103, 104) • 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. F l i c k e r a p p e a r s o n • Set [FAN MODE] to other than [HIGH ALTITUDE] mode when using the projector at altitudes approximately 5500 feet/1700 screen meters or lower. Using the projector at altitudes less than approximately 5500 feet/1700 meters and setting to [HIGH ALTI- TUDE] can cause the lamp to overcool, causing the image to flicker. Switch [FAN MODE] to [AUTO]. (→ page 92) Image is scrolling ver- • Check the computer's resolution and frequency. Make sure that the resolution you are trying to display is supported tically, horizontally or by the projector. (→ page 135) both • Adjust the computer image manually with the Horizontal/Vertical in the [IMAGE OPTIONS]. (→ page 82) Remote control does • Install new batteries.(→ page 10) not work • Make sure there are no obstacles between you and the projector. • Stand within 22 feet (7 m) of the projector. (→ page 10) Indicator is lit or blink- • See the POWER/STATUS/LAMP Indicator. (→ page 128) ing Cross color in RGB • Press the AUTO ADJ. button on the projector cabinet or the remote control. (→ page 23) mode • Adjust the computer image manually with [CLOCK]/[PHASE] in [IMAGE OPTIONS] in the menu. (→ page 81) 129