Troubleshooting - LG 21HK512D Handbuch

TROUBLESHOOTING

Problem
Nothing is displayed on the screen
Image persistence (Image Sticking)
The screen has defective pixels
Image is unstable, unfocused or swimming is apparent
OSD is not sized properly
Is the [No Signal] message displayed?
LED on monitor is not lit (No Green or Light Orange can be seen)
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The signal cable should be completely connected to the display card/computer.
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The display card should be completely seated in its slot.
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Check the AC switch. Should be in the On position.
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OSD Control Knob and computer power switch should be in the On position.
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Check to make sure that a supported mode has been selected on the display card or system being used. (Please consult display card or system manual
to change graphics mode)
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Check the monitor and your display card with respect to compatibility and recommended settings.
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Check the signal cable connector for bent or pushed-in pins.
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Image persistence is when a residual or ghost image of a previous image remains visible on the screen. To alleviate image persistence, turn off the
monitor for as long as the previous image was displayed.
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Try not to operate the LCD with a fixed image on the screen for more than thirty minutes.
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The screen has defective pixels (e.g. slightly light or dark). This is due to the characteristics of the panel itself and not the LCD product.
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Signal cable should be completely attached to the computer.
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Check the monitor and your display card with respect to compatibility and recommended signal timings.
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If your text is garbled, change the video mode to non-interlace and use 50Hz refresh rate.
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Use the OSD Image Adjust controls to increase or decrease the coarse total.
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Check to make sure that a supported mode has been selected on the display card or system being used.
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Signal cable should be completely attached to the computer.
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Make certain the computer is not in a power-saving mode. (Touch the keyboard or mouse)
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If no video is present on the screen, turn the Power button off and on again.
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Power Switch should be in the On position and power cord should be connected.
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Check the power cable should be connected surely. Press the OSD Control Knob or switch display condition with source or resolution.
Check to see