NEC NP-PA622U User's Manual - Page 188

9. Appendix Common Problems & Solutions (→ "Power/Status/Lamp Indicator" on page 174.) Problem 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 These Items • 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 144) • 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 116) • 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/1600 meters or higher. Using the projector at altitudes approximately 5500 feet/1600 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 97) 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. • Ensure that the [OFF TIMER], [AUTO POWER OFF] or [PROGRAM TIMER] is off. (→ page 100, 115) • Check if the appropriate input is selected. (→ page 16) If there is still no picture, press the INPUT button or one of the input buttons again. • Ensure your cables are connected properly. • Use menus to adjust the brightness and contrast. (→ page 76) • Ensure that the lens cover is open. (→ page 14) • Reset the settings or adjustments to factory preset levels using the [RESET] in the Menu. (→ page 116) • Enter your registered keyword if the Security function is enabled. (→ page 36) • If the HDMI input or the DisplayPort 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 page 177. • 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 97) • Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option. (→ page 97) • Adjust [HUE] in [PICTURE]. (→ page 77) • Reposition the projector to improve its angle to the screen. (→ page 18) • Use the Keystone correction function to correct the trapezoid distortion. (→ page 33) • Adjust the focus. (→ page 20) • Reposition the projector to improve its angle to the screen. (→ page 18) • Ensure that the distance between the projector and screen is within the adjustment range of the lens. (→ page 158) • Has the lens been shifted by an amount exceeding the guaranteed range? (→ page 162) • 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. Flicker appears on screen Image is scrolling vertically, horizontally or both • Set [FAN MODE] to other than [HIGH ALTITUDE] mode when using the projector at altitudes approximately 5500 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 97) • Check the computer's resolution and frequency. Make sure that the resolution you are trying to display is supported by the projector. (→ page 164) • Adjust the computer image manually with the Horizontal/Vertical in the [IMAGE OPTIONS]. (→ page 79) 175