Brand: MITSUBISHI ELECTRIC
Category: Monitor
Document Type: Manual
Language: EN
Manual for MDT552S
Uploaded: Nov. 21, 2025, 6:21 p.m.
Warranty Information
No warranty information is available in the provided pages.
Powering On/Off: Use the POWER button on the remote or monitor. Ensure main power switch is ON.
Input Selection: Use the INPUT button on the remote or monitor to cycle through video sources.
Picture Adjustment: Use the MENU button to access OSD settings for Picture Mode, Screen Adjustment, etc.
Volume Control: Use the VOL +/- buttons on the remote.
PIP/POP: Use the PIP buttons on the remote to enable Picture-In-Picture or Picture-Outside-Picture modes.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| No picture | Signal cable not securely connected. Display card not seated properly. Main power switch or computer power switch OFF. Incorrect mode selected on display card/system. Incompatibility between monitor and display card. Bent or pushed-in pins on signal cable connectors. | Securely connect signal cable. Ensure display card is seated. Turn on power switches. Consult display card/system manual for graphics mode. Check compatibility and settings. Check signal cable connectors. |
| Power button does not respond | Monitor is off. | Unplug the power cord to reset the monitor. |
| Image persistence | Displaying static images for long periods. | Turn off the monitor for the duration the image was displayed. Use moving images or screen savers. Turn off the monitor when not in use. |
| Image is unstable, unfocused or swimming | Signal cable not securely attached. | Securely attach signal cable. |
| Incorrect OSD Image Adjust settings. | Use OSD Image Adjust to fine-tune focus and display. Re-adjust if display mode is changed. | |
| Incompatibility or incorrect signal timings. | Check monitor and display card compatibility and signal timings. | |
| Incorrect video mode. | Change to non-interlace mode and use 60 Hz refresh rate if text is garbled. | |
| Image of component signal is greenish | YPbPr input connector not selected. | Select the YPbPr input connector. |
| LED on the monitor is not lit | Power Switch OFF. Computer in power-saving mode. | Turn Power Switch ON and connect power cord. Wake computer from power-saving mode. |
| RED LED on the monitor is blinking | Failure may have occurred. | Contact authorized MITSUBISHI ELECTRIC service facility. |
| Displayed image is not sized properly | Incorrect OSD Image Adjust settings. Incorrect mode selected on display card/system. | Use OSD Image Adjust for coarse adjustment. Consult display card/system manual for graphics mode. |
| Selected resolution is not displayed properly | Incorrect resolution selected in OSD Display Mode. | Use OSD Display Mode to check and select the appropriate resolution. |
| No sound | Speaker cable not connected. Mute is activated. Volume set to minimum. | Connect speaker cable. Deactivate mute. Adjust volume to audible level. |
| Wireless remote control is not available | Low batteries. Batteries inserted incorrectly. Remote not pointed at sensor. | Check battery status. Insert batteries correctly. Point remote at monitor's remote sensor. |
| "SCHEDULE"/"OFF TIMER" function is not working properly | SCHEDULE disabled when OFF TIMER is set. OFF TIMER reset if power interrupted. | Check function settings. Ensure uninterrupted power supply for OFF TIMER. |