A Troubleshooting
Solving common problems
The following table lists possible problems, the possible cause of each problem, and the recommended solutions.
Problem | Possible cause | Solution |
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No image is | Power cord is | Be sure the power cord is properly connected to the outlet. |
displayed. | not connected. | ● Verify that the outlet has power to it. |
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| |
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| ● Check that the fuse or breaker has not tripped or burned out. |
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| See if the power switch is turned on. |
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| Might need service. |
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|
Power is on, | Screen needs | Adjust brightness, backlight and contrast again. |
power indicator | adjustment. | Backlight might need repair. |
is green, but the |
| |
|
| |
screen appears |
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|
extremely dark. |
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Power indicator | Display is in | Press power button ( ) on the back of the display. |
is red. | power saving |
|
| mode. | Activate a signal source. |
| No video signal | Turn off equipment and then back on. |
| is active. | Select an active input or set Auto Detection in the OSD menu to on. |
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| |
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|
Out of Range | Input signal is | The signal from the media player/computer (video card) is out of the vertical or |
message | out of frequency | horizontal frequency range of the display. Adjust the frequency range. |
appears. | range. | NOTE: Vertical Frequency — To enable the user to watch the display, the screen |
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| |
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| image should change multiple times every second like a fluorescent lamp. The vertical |
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| frequency or refresh rate is the number of times the image displays per second. The |
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| unit is measured in Hz. |
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| Horizontal Frequency — The horizontal interval is the time to display one vertical line. |
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| When 1 is divided by the horizontal interval, the number of horizontal lines displayed |
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| every second can be tabulated as the horizontal frequency. The unit is measured in |
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| kHz. |
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|
Check video | Signal cable is | The signal cable between the media player/computer and display is not connected. |
cable message | not connected. | Make sure that the signal cable is properly connected. |
appears. |
| |
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| |
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OSD Lockout | Key Lock | To unlock the menu, press the up and down arrows on the back of the display |
message | function is | simultaneously and hold for 5 seconds. |
appears when | turned on. |
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pressing the |
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|
Menu button. |
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The screen | Screen is out of | Adjust the position using the OSD menu options H Position and V Position in the |
looks abnormal; | adjustment. | Option 1 menu. |
screen position |
| Check that the video card resolution and frequency are supported by the display. If the |
is wrong. |
| |
| frequency is out of range, set to the recommended resolution in the Control Panel → | |
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| |
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| Display → Settings of the operating system. |
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52 Appendix A Troubleshooting | ENWW |
