
5-2  Before Requesting Service
 Please check the following before requesting
 Please check the following before requesting 
A blank screen appears / I cannot turn the product on
| Is the power cord connected properly? | Check the connection status of the power cord. | |
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 | Check the cable connecting the PC and the product. | |
| Is the <Check Signal Cable> message displayed on the | (Connected using the DVI cable) | |
| screen? | If the message appears on the screen even if the cable is | |
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 | properly connected, recheck the input signal by pressing the [ | |
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 | This occurs when the signal from the graphics card exceeds | |
| Is the <Not Optimum Mode> message displayed on the | the maximum resolution or the maximum frequency of the | |
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| In this case, set up the appropriate resolution and the fre- | ||
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 | 1. This occurs when the power saving function is running. | |
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 | If you click the mouse or press any key, the screen will be | |
| Is a blank screen displayed and does the power LED blink at | turned on. | |
| a 1 second interval? | 2. If the “Check Signal Cable” condition persists for more than | |
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 | five minutes, Lossless mode will be activated.In Lossless | |
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 | mode, the backlight of the monitor will turn off. | |
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 | If you connect the DVI cable when the PC has booted up or if | |
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 | you reconnect the DVI cable after disconnecting the cable | |
| Did you connect with a DVI cable? | while using a PC, the screen may not be displayed because | |
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 | some graphics cards do not output the video signal. | |
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 | In this case, reboot the PC while the DVI cable is connected. | |
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THE IMAGE IS TOO LIGHT OR TOO DARK.
Adjust the <Brightness> and <Contrast>. (Refer to the <Brightness>, <Contrast>)
| The display brightness can differ according to the mode set for < | 
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 | Bright> is set to <Dynamic Contrast>, the display brightness can differ according to the input signal. | ||||
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 | The on screen adjustment menu (OSD) does not appear. | ||||
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| Did you cancel the screen adjustment? | Check if the OSD Adjustment Lock function is set to Off. | |||||
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 | The color is weird / The picture is displayed in black and white | ||||
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| Is the entire screen displayed in the same color as if viewing | Check the cable connection to the computer. | |||||
| the screen through a cellophane paper? | Reinsert the graphics card into the computer completely. | |||||
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| Is the graphics card configured correctly? | Set up the graphics card referring to the user manual. | |||||
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 | The display area suddenly moves to an edge or to the center. | ||||
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| Did you change the graphics card or the driver? | Please press the [AUTO] button to run the auto adjustment | |||||
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| Troubleshooting |