Display repair - picture displayed with two edges

[ulix]

Hi,
I have here a Lenovo Thinkstation 2240 display. It's not displaying the picture correct. The edges are displayed two times. At first I tought that the vga connector is faulty but it doesn't change the picture when wiggeling on the connector.
The first picture shows some color missmatch which was there but I can't reproduce. The last two pictures show the edge offset. How does this happen?
I checked all connectors inside but this doesn't change anything.
Does someone know how to fix this? Is the panel faulty?

[ulix]

2nd set

[nctnico]

If you get shadows then your VGA cable is of poor quality and needs to be replaced.