I have a 14 plate (J11) QQ Tekna and the image from the rear camera sometimes breaks up, can be darker than the other cameras, and sometimes reports it needs cleaning. It is clean. Tapping in the area of the camera normally brings the image back for a while. I suspect either a connection problem, or...

I suspect it is the aerial. If I am right, I suggest you leave alone.

I also have audio cutout problems with my audio system. (Tekna 2014 reg) It seems to affect all audio sources and lasts for just over 20 seconds. The problems initially showed up about a year ago and I spent some time trying to analyse them. My initial thoughts were that it was a bad joint, but as t...