Display malfunktion. What may be the problem and how to solve

My dk2 display shows green picture on both sides, and a red picture overlaying on the right side, which is turned by 90 degrees. I allready checked/changed cables and connectors, so obviosly the defect seems to be inside the HMD, motherboard or display itself.

Has somebody experience by this malfunction os does anyone knows what part could be the reason for?