AEG CTV 4870 LCD Operating Instructions Manual page 45

TROUBLE SHOOTING TIPS
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Led lamp indicator on but no picture
Check the monitor setting :contrast ,brightness.
Check if the wire is connected correctly.
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Some unusual spots on screen
Some dot defects may appear on the screen, like red, green or
blue, Spots, However, this will have no impact or effect on the
monitor performance.
19" TFT LCD TV CTV 4870 LCD
45
GB