Mitsubishi Electronics LDT651P operation manual Troubleshooting

Troubleshooting

Before calling for repair services, make sure following checks for possible remedies to the encountered symptoms.

There is no picture or sound.

•Is the power cord disconnected? (See page 12.)

•Is the main power switch set to “OFF”? (See page 14.)

•Is the monitor in standby mode (the power LED illuminating in orange)? (See page 14.)

•Make sure correct input mode is selected. (See page 15.)

•If any external equipment is connected, make sure the equipment is operating (playing back).

Remote control does not work.

•Are the batteries inserted with polarity (+,-) aligned? (See page 12.)

•Are the batteries exhausted? (See page 12.)

•Point the remote control unit toward the monitor’s remote control sensor. (See page 12.)

•Is the menu display hidden or is operation disabled? (See page 23.)

Sound from left and right speakers is reversed. Sound is heard from only one side.

•Are audio cables connected properly? (See pages 10 and 11.)

•Make sure audio cables for external speakers are connected properly: left and right cables may be reversed or one of the two cables may not be connected. (See page 11.)

•Check the setting of BALANCE for AUDIO menu. (See page 18.)

There is a picture but no sound.

•Is the sound muted? (See page 15.)

•Make sure the volume is not set to minimum. (See page 15.)

•Is the PC audio cable (commercially available) connected? (See page 10.)

•Are audio cables connected properly? (See page 10.)

•Is the audio signal input properly to the audio input terminal corresponding to the selected video input terminal? (See page 15.)

Unstable video.

•The signal may be incompatible. (See pages 10 and 34.)

•Try the automatic screen adjustment when the PC2 input terminal or PC3 input terminals is used. (See page 22.)

PC1 or AV1 does not appear properly.

•Is the setting of DVI SELECT correct? (See page 19.)

•Is the input signal compatible with this monitor? (See pages 10 and 34.)

•Turn off the power to the connected equipment and then turn the power on again.

•If the monitors are connected in a daisy chain, turn off the power to all the monitors connected in a daisy chain and then turn the power on again.

PC3 or AV2 does not appear properly.

•Is the setting of BNC SELECT correct? (See page 19.)

•Is the input signal compatible with this monitor? (See page 34.)

Control buttons do not work.

There is no picture.

•Some kind of load noises from outside might interfere with normal operation. Turn off the power and turn it on after waiting at least 5 seconds, and then check the operation.

Power LED flashes red.

“SERVICE CALL” appears in the corner of the screen.

•Hardware has a problem. Turn off the monitor and request repair from your MITSUBISHI dealer.

When “TEMPERATURE” is displayed.

•When the internal temperature of the monitor rises excessively, the brightness of the backlight decreases in order to prevent high-temperature-related problems. Remove the cause of the excessive rise in temperature. (See the description below.)

The monitor sometimes makes a cracking sound.

•You may hear cracking sound from the monitor. This happens when the cabinet slightly expands and contracts according to change in temperature. This does not affect the monitor’s performance.

nWarning when temperature rises

•When the internal temperature of the monitor rises excessively, the brightness of the backlight decreases automatically in order to prevent high-temperature- related problems. When this occurs, “TEMPERATURE” is displayed on the screen and the Power LED flashes red and green alternately.

•If the internal temperature rises further, the monitor automatically enters standby mode. (The Power LED continues flashing red and green alternately.)

Solution:

•If the monitor enters standby mode due to a rise in temperature, to return to normal display, turn the main power switch off and then back on again. The monitor, however, will enter standby mode again if the cause of the temperature rise is not eliminated. (See page 9.)

•Check whether the monitor is placed at a location where a quick rise in temperature is likely. Internal temperature rises quickly if the vents on the monitor are blocked.

•Internal temperature rises quickly if dust accumulates inside the monitor or around the vents. Remove dust if possible. Ask MITSUBISHI dealer about removing internal dust.

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