Chapter 5Maintenance—TroubleshootingENGLISH - 111TroubleshootingReview the following points. For details, refer to the corresponding pages.ProblemsPoints to be checkedPagePower does not turn on.fIs the power plug firmly inserted into the outlet?―fIs the switch turned ?33fIs the wall outlet supplying electricity?―fHave the circuit breakers tripped?―fIs the temperature indicator or the light source indicator lit orflashing?108No image appears.fAre connections to external devices correctly performed?26fIs the input selection setting correct?37, 73fIs the [BRIGHTNESS] adjustment setting at a minimum?46fIs the external device that is connected to the projector working properly?―fIs the AV mute function in use?36The image is fuzzy.fIs the lens focus set correctly?34fIs the projection distance appropriate?24fIs the lens dirty?15fIs the projector installed perpendicular to the screen?―The color is pale or grayish.fIs the [COLOR] or [TINT] adjusted correctly?46fIs the external device connected to the projector adjusted correctly?26fIs the RGB cable damaged?―The remote control doesnot respond.fAre the batteries depleted?―fIs the polarity of the batteries set correctly?21fAre there any obstructions between the remote control and the remote control signalreceiver of the projector?18fIs the remote control being used beyond its effective operation range?18fAre other forms of light, such as fluorescent light, affecting the projection?18fIs the [REMOTE CONTROL] setting in [CONTROL DEVICE SETUP] set to[DISABLE]?86fIs the ID number setting operation correct?21The buttons on the controlpanel do not operate.fIs the [CONTROL PANEL] setting in [CONTROL DEVICE SETUP] set to [DISABLE]?86The image does not displaycorrectly.fIs the [SYSTEM SELECTOR] selection set correctly?49fIs there a problem with the video tape or other image sources?―fIs a signal which is not compatible with the projector being input?120Image from a computerdoes not appear.fIs the cable too long? (Use D-Sub cables that are 10 m (32'10") or shorter.)―fIs the external video output of the laptop computer set correctly? (Ex.: The externaloutput settings may be switched by pressing the “Fn” + “F3” or “Fn” + “F10” keyssimultaneously. Since the method varies depending on the computer type, refer tothe user manual provided with your computer.)―Image from a computer’sDVI-I output does notappear.fIs the [DVI-I IN] setting set to [EDID3]/[EDID2]?61fThe graphics accelerator driver of the computer may need to be updated to thelatest version.―fThe computer may need to be restarted after performing [DVI-I IN] settings.61fIs the [DIGITAL/ANALOG] setting in [DVI-I IN] correct?61Video from HDMIcompatible device doesnot appear or it appearsjumbled.fIs the HDMI cable connected securely?26fTurn the power of the projector and the external device on and off.―fIs a signal which is not compatible with the projector being input?120No audio is coming fromthe HDMI compatibledevicefSet audio of the external device to linear PCM.―fCheck [AUDIO IN SELECT] in [AUDIO SETTING].77fWhen there is no audio through the HDMI cable connection, use the terminal.77