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Troubleshooting flat panel monitor issues
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Select your symptom. If it does not appear in the following list, continue to the Need more help? section.
The monitor is possibly not receiving power. Perform the following steps to fix the problem:
- Ensure that the electrical outlet and the monitor are both switched on.
- Check that the power cord is firmly plugged into the electrical outlet and the power supply unit.
- If the power cord has a removable fuse, replace it.
- Try another power cord.
- Try another electrical outlet.
- Check the power connection at the back of the panel.
 Brightness and Contrast may be too low. Adjust the brightness and contrast using the On-screen display controls (OSD) by selecting the button.
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Adjusts Brightness. |
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Adjusts Contrast.
Note: Not available with digital input. |
The monitor is in the Power Management Standby state. The power management feature is invoked when the computer recognizes that you have not used your mouse or keyboard for a user-definable period. Perform the following steps to bring monitor out of the power management state:
- Press any key on the keyboard or move the mouse to restore operation.
- Check the Power Management software on your computer.
 Press the (OK) key to switch between analog and digital mode. If the panel is the wrong mode for the signal being provided, the monitor appears to go into sleep mode.
Display mode of the computer is outside the range of the monitor. The display mode the monitor uses is controlled by your computer. Therefore, you should refer to your computer's documentation for details on how to change display modes.
The image size, position and shape may change when the display mode changes. This is normal and the image can be readjusted using the IMAGE SETUP and the monitor controls.
Note: Unlike CRT monitors, which requires a high refresh rate to minimize flicker, TFT technology is inherently flicker-free. If possible, configure your computer for 1600 x 1200 addressability at 60Hz vertical refresh rate.
Use the following table as a guideline and reconfigure your computer to use a supported display mode. The highest resolution (for example, 1600 x 1200) produces the optimal output, but limitations of your monitor may prohibit this setting. Adjust the addressability mode until an image appears.
| 640 x 480 |
60 Hz |
| 640 x 480 |
75 Hz |
| 640 x 480 |
85 Hz |
| 640 x 350 |
70 Hz |
| 720 x 400 |
70 Hz |
| 800 x 600 |
60 Hz |
| 800 x 600 |
75 Hz |
| 800 x 600 |
85 Hz |
| 832 x 624 |
75 Hz |
| 1024 x 768 |
60 Hz |
| 1024 x 768 |
75 Hz |
| 1024 x 768 |
85 Hz |
| 1152 x 870 |
75 Hz |
| 1152 x 900 |
66 Hz |
| 1280 x 1024 |
60 Hz |
| 1280 x 1024 |
75 Hz |
| 1600 x 1200 |
60 Hz |
| 1600 x 1200 |
75 Hz |
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| "CHECK SIGNAL CABLE" message is shown and power indicator is steady amber. |
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The monitor is not receiving a video signal. Perform the following steps to fix the problem:
- Check that the signal cable is firmly connected to your computer.
- Check that no pins are bent in the signal cable connector.
There are noises in the video signal. The IMAGE SETUP function is used to adjust the level of noise in the video signal which causes horizontal lines or areas where the image appears to be unstable and jitters or shimmers. This can be done automatically or manually.
Note: It is not applicable to digital input.
Use the image setup fix the problem:
 Select (Image Setup) menu in the OSD.
- Select Manual to adjust CLOCK/PHASE settings.
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OSD Icon
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Description
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Auto. If Auto is selected the image will automatically adjust. |
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Manual. If manual is selected the user will go the manual adjustment screen. This will allow you to remove any horizontal noise and clear or sharpen the image of characters. |
The color setting may be incorrect. Perform the following steps to adjust the color settings:
 Select (Image Properties) from the OSD menu. Select (Color Properties) to adjust the color mode you find most comfortable or fine tune the colors using the Custom menu.
| Red |
Increases or decreases redness. |
| Green |
Increases or decreases greeness. |
| Blue |
Increases or decreases blueness. |
| Save |
Saves settings. |
A small number missing, discolored, or lighted dots may be present on the screen, which is an intrinsic characteristic of the TFT LCD technology and is not an LCD defect.
The settings adjustable with the user controls are viewed through the OSD. Press the (OK) button to display the main OSD menu.
OSD main menu:
Note: The LCD monitor needs time to become thermally stable the first time you turn it on each day. Thus, to achieve more accurate adjustments for parameters, allow the LCD monitor to warm up (be on) for 15 minutes before making any screen adjustments.
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| Applicable countries and regions |
| Worldwide |
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| Document id: MIGR-50391 |
| Last modified: 2005-11-23 |
| Copyright © 2009 IBM Corporation |
| Copyright © Lenovo 2009, all rights reserved |
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