What kind of distortion are you seeing ? Does it look like the picture is moving around a bit (ie ripply edges etc...) or just like something is messing with the brightness and colour (ie noise on the lines) ?

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8