Monitor Picture interference??

[lettuce]

Seem to have a slight problem with my WG K7000 monitor. When playing games such as, Track and Field, Hyper Sports, or Combat School etc, where the cab is getting a bit of a pounding, some times the screen seems to wobble/shake like a interference effect! (like u get sometimes when ure mobile phone goes of by a monitor) What could case this, i think that one of the connections on the monitor maybe loose or something?? as that why it happens when the cab is being shaken slightly due to Track & Field button mashing?

[Ken Layton]

Could be some tarnished contacts on frame ground connectors throughout the cabinet. Could be some bad solder joints on the monitor. Could be a wierd video harness to the monitor. Could be bad capacitors in the game power supply. In short it could be anything.