Chapter 6 Maintenance — Troubleshooting138 - ENGLISHTroubleshootingReview the following points. For details, see the corresponding pages.Problems Points to be checked PagePower does not turn on.f Is the power plug firmly inserted into the outlet? ―f Is the switch set to ? 46f Is the wall outlet supplying electricity? ―f Have the circuit breakers tripped? ―f Is the lamp indicator or the temperature indicator lit or blinking? 130f Is the lamp cover attached securely? 136No image appears.f Are connections to external devices correctly performed? 36f Is the input selection setting correct? 47f Is the [BRIGHTNESS] adjustment setting at a minimum? 61f Is the external device that is connected to the projector working properly? ―f Is the AV mute function in use? 50, 85f Is the lens cover still attached to the lens? 42Image is fuzzy.f Is the lens focus set correctly? 48f Is the projection distance appropriate? 32f Is the lens dirty? 22f Is the projector installed perpendicular to the screen? ―Color is pale or grayish.f Is [COLOR] or [TINT] adjusted correctly? 62f Is the external device connected to the projector adjusted correctly? ―f Is the RGB cable damaged? ―Audio is not output.f Is the external device connected correctly to the audio input terminal? 28f Is [MUTE] in [AUDIO SETTING] set to [ON]? 93f Is the audio input selection in [AUDIO SETTING] set correctly? 93Audio is not output fromthe built-in speaker.f Is [BUILT-IN SP] in [AUDIO SETTING] set to [OFF]? 92f Is the audio input selection in [AUDIO SETTING] set correctly? 93Remote control does notrespond.f Are the batteries depleted? ―f Is the polarity of the batteries set correctly? 29f Are there any obstructions between the remote control and the remote control signalreceiver of the projector? 26f Is the remote control being used beyond its effective operation range? 26f Are other forms of light, such as fluorescent light, affecting the projection? 26f Is the [REMOTE CONTROLLER] setting in [CONTROL DEVICE SETUP] set to[DISABLE]? 99f Is the ID number setting operation correct? 55Menu screen does notappear. f Is the on-screen display function turned off (hidden)? 51Buttons on the controlpanel do not operate. f Is the [CONTROL PANEL] setting in [CONTROL DEVICE SETUP] set to [DISABLE]? 99Image does not displaycorrectly.f Is the [TV-SYSTEM], [RGB/YCBC R]/[RGB/YPBPR] selection set correctly? 65f Is there a problem with the video tape or other image sources? ―f Is a signal which is not compatible with the projector being input? 149Image from a computerdoes not appear.f Is the cable too long? (For D-Sub cables, the cable length should be 10 m (32'10")or shorter.) ―f Is the external video output on the laptop computer set correctly? (Ex.: The externaloutput settings may be switched by pressing the “Fn” + “F3” or “Fn” + “F10”simultaneously. Since the method varies depending on the computer type, refer tothe user manual provided with your computer.)―Video from HDMIcompatible device doesnot appear or it appearsjumbled.f Is the HDMI cable connected securely? 36f Turn off and on the power of the projector and the external device. ―f Is a signal which is not compatible with the projector being input? 149
