Red Colored shadow in white area on black background, DELL M5010

I have DELL Inspiron 15 (M5010). I nave malfunction of the color on LCD screen: red ghost (double shadow) by white objects in the black back ground. The color of the start menu windows is blue (normally is white). This defect sometime disappear by itself.

I connect mu computer thought  VGA  connector to external lcd monitor. It is working properly, the color was correct with now colored shadow.

Please help me. Does it something with flat LCD cable is wrong or...?

D-r Avramovski Petar

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