BVM colour issue

[gamelife]

recently the green colour has been coming through stronger than normal (usually on start up) and i originally thought that it was my supergun rgb pots...after a bit of testing i realised that if i slightly moved my BNC cable (i mean even a little touch) the colour returns to normal. just wondering why this would happen, not sure if its just a loose connector or could it be dirt inside the input?

i'd have thought that if the connection was loose or dirty that the connection would drop and loose the green signal all together but the colour gets stronger? really weird

thanks in advance

[Syntax]

Could be the 75R termination coming loose.

[gamelife]

that's what i thought but it only corrected itself after a moved the green BNC input not the 75ohm terminator, in any case, i've tightened up the connection and put a new terminator on the green output...fingers crossed that sorts it