Reversing camera only works in cold weather

[oztme]

Hi Guys,

I have an E70 LCI with a reversing camera (top view), and the rear camera only works in cold weather (less than 10 degrees C / 42F).

I have replaced the rear camera to no effect.

The symptom is the screen in the console goes blue, and can't see out the reversing camera.

Has anyone else had this problem?

Not sure if I need to replace wiring (maybe has moisture/hairline crack/similar), or replace ECU?

If I replace the ECU, I think that will be expensive.
I'd have to recode it too wouldn't I? (I have an ICOM, but have never used it)..

Please sing out if you have experience of this/advice...

Cheers,
OZTme