Yes, the shaking of the left image may be due to an issue with the V-MIX board. To be sure of that, they should inverse the LD players. After inverting the LD players, if the issue appears to the right of the screen, it's an issue with the LD player itself. If not, the V-MIX board has obviously an issue. They are a ton of capacitors on the VMIX board. a bad one could cause -after warming up a certain amount of time- such kind of visual issues (wombling picture)...