My rear camera bounces between picture and blue screen, recently started annoyingly. Also my drivers mirror camera and puddle light dont work either and if I recall only one of the from bumper ones work. What is the usual issues when they blue screen? Many thanks

I recently put a post up about my front left camera not working and showing a blue screen on the display. I removed the bumper, swapped the left and right cameras but the fault stayed on the left side so can only be wiring. I did manage to source a file with the part numbers and descriptions for all the loom repair sections available from Land Rover as it seems the cables used for the cameras are very fragile and prone to failure over time. My front bumper has already had a repair section fitted for the front left camera which makes me think it might have failed again

The module which processes all the camera signals is underneath the drivers seat I believe so it could be worthwhile having a look there to begin with for your cameras flickering between image and blue screen, can remove and refit the connectors ect...

Each camera uses a colour coded connector group.

Front Left is White
Front Right is Black
Rear is Blue

The mirror cameras I do not know, but I think one is green and one is purple, not sure which side is which.

Hope that is of some help

 2010 Range Rover Autobiography 5.0 SC
2005 Lotus Elise 111R