Manual for LDT42IV

Name: Manual for LDT42IV
Brand: Mitsubishi
Availability: InStock

Brand: Mitsubishi

Category: Monitors

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 8:47 p.m.

Warranty Information

Refer to the warranty information provided with your product documentation or contact Mitsubishi Electric.

Power ON and OFF Modes

The LCD monitor power indicator will turn green while powered on or red in off mode. The monitor can be powered on or off using the following three options:

Pressing the Main Power Switch.
NOTE: When the Main Power Switch is used to power off the LCD monitor, the remote control and the power button will not activate the on mode and both green and red power indicator turn off. Be sure to turn the Main Power Switch to the on mode before using these two options.
Pressing the power button.
NOTE: Before pressing the power button, be sure to turn on the Main Power button on the LCD monitor.
Using the remote control.
NOTE: Before operating the remote control, be sure to turn on the Main Power Switch on the LCD monitor.

Power Indicator

The LCD monitor power indicator will turn green while powered on or red in off mode.

Using Power Management

The LCD monitor follows the VESA approved DPM Power Management function. This function is an energy saving function that automatically reduces the power consumption of the display when the keyboard or mouse has not been used for a fixed period.

Selecting a video source

Use the input button to set [VIDEO]. Use the COLOR SYSTEM menu to set [AUTO], [NTSC], [PAL], [SECAM], [PAL60], [4.43NTSC], according to your video format.

Picture Mode

Selects from picture mode: [HIGHBRIGHT], [STANDARD], [sRGB], [CINEMA].

Audio Source Switching

You can switch the audio source using the AUDIO INPUT button.

Picture Size

Selects picture size: [FULL], [NORMAL], [CUSTOM], [DYNAMIC] and [REAL].

Troubleshooting and error codes

Problem	Possible Cause	Solution
No picture	Signal cable not fully connected	Connect the signal cable completely to the display card/computer.
	Display card not seated properly	Ensure the display card is completely seated in its slot.
	Power switches are off	Turn the Front Power Switch and computer power switch ON.
	Unsupported mode selected	Check that a supported mode has been selected on the display card or system (consult display card or system manual).
	Compatibility issues	Check monitor and display card compatibility and recommended settings.
	Bent or pushed-in pins on connector	Check the signal cable connector.
Power Button does not respond	Monitor needs reset	Unplug the monitor's power cord from the AC outlet, wait, then plug it back in.
Image persistence	Displaying static image for long periods	Turn off the monitor for as long as the previous image was displayed. Use moving images or screen savers. Set "POWER SAVE", "SCREEN SAVER", "DATE &TIME", and "SCHEDULE" functions.
Image is unstable, unfocused or swimming	Signal cable not fully attached	Ensure the signal cable is completely attached to the computer.
	Fine adjustment needed	Use OSD Image Adjust controls to focus and adjust display.
	Display mode changed	Re-adjust OSD Image Adjust settings.
	Compatibility/timing issues	Check monitor and display card compatibility and recommended signal timings.
	Incorrect video mode	Change video mode to non-interlace and use 60 Hz refresh rate if text is garbled.
Image of component signal is greenish	Incorrect input selected	Check if the DVD/HD input connector is selected.
LED on monitor is not lit	Power issues	Ensure power switch is ON and power cord is connected. Ensure computer is not in power-saving mode.
RED LED on monitor is blinking	Internal failure	Contact authorized MITSUBISHI ELECTRIC service facility.
Display image is not sized properly	Coarse adjustment needed	Use OSD Image Adjust controls to increase or decrease coarse adjustment.
	Unsupported mode selected	Check that a supported mode has been selected on the display card or system (consult display card or system manual).
Selected resolution is not displayed properly	Incorrect resolution selected	Use OSD Display Mode to enter Information menu and confirm that the appropriate resolution has been selected. If not, select corresponding option.
No Sound	Speaker cable not connected	Check speaker cable connection.
	Mute is activated	Check if mute is activated.
	Volume set to minimum	Check if volume is set at minimum.
Remote Control is not available	Battery issues	Check battery status and ensure they are inserted correctly.
	Remote sensor blocked	Check if the Remote Control is pointing at the monitor's remote sensor.
"SCHEDULE”/“OFF TIMER” function is not working properly	Conflict with other function	The "SCHEDULE" function is disabled when the "OFF TIMER" is set. The "OFF TIMER" resets if power is interrupted unexpectedly.
Stripe Noise	Display pattern dependent	This is normal and not a product fault.