My top screen jitter shakes I did take the back off and marked before then adjusted the VR1 screw quite a bit in both directions with sadly no difference ;( I al going to see if I can't try to re-seat the brown ribbon cable it appears to be under the board so I have to figure out how to get that to lift out (possibly bottom screen holding it in), but if that doesn't work and I find a top screen replacement with cable I would "HOPE" that helps fix it.