Mitsubishi Electronics L75A81, L75-A91 manual General TV Operation Symptom Remarks

Appendices 79

Appendix E: Troubleshooting, continued

General TV Operation

	Symptom	Remarks
1.	A fan is running even while the TV is powered	The room is too warm. When the TV is off, internal components
	off.	continue to draw power and must be cooled by the fan.
2.	The TV remote control does not work.	• Check that the batteries are fresh and installed correctly.
		• Check that the control mode on the remote is set to TV.
		•	Be no more than 20 feet from the TV when using the remote control.
		• Program the remote control to operate the TV or other device.
		• Reset the remote control.
3.	When I try to use the remote control, the	Replace the batteries.
	POWER key blinks five times.
4.	TV does not respond to the remote control or	•	Unplug the AC power cord for 10 seconds.
	to control-panel buttons and TV will not power	•	Press and hold the POWER button on the control panel to
	on or off.		perform system reset.
5.	When a device is selected from the Activity	• Make sure the selected device is turned on.
	menu, the screen is blue or black (no signal	• Begin play of the device.
	source).
6.	You have forgotten your Lock menu pass code.	See “Bypassing the Parental Lock”, Appendix B.
7.	Rating restrictions are not working.	Open the Lock > Parental Lock menu and:
		• Verify that the ratings locks are active.
		• Check the Lock Time/Unlock Time to check if rating restric-
			tions are disabled.
		• Rating restrictions apply only to content on the ANT input.
8.	On-screen displays appear each time you	Normal TV operation.
	change a function.
9.	A warning message appeared on screen	•	Internal TV temperature has exceeded proper levels. Cool
	stating, “TV will shut down in a few seconds.		the room.
	Please check if the air flow is blocked.”	•	The TV has overheated. Clear blocked air vents and ensure
			at least four inches of clearance on all sides of the TV.
10.	I have turned on CEC for my HDMI devices but	• First turn off the TV’s HDMI control for the specific device.
	control is erratic and I wish to disable it.		Open the Inputs > HDMI Control menu, select the device,
			select Off.
		•	Disable CEC on the device itself. See the device’s instruc-
			tions.
		•	If the problem persists, do the following:
			1. Disconnect the device from the TV.
			2. Open the Inputs > Name menu and select Delete for the
			device.
			3. Reconnect the device to the TV and Auto Input Sensing
			will recognize the device with CEC disabled.

In the U.S. call 1(877) 675-2224 for assistance.