We have a four year old Mejestic 180 with a clip on mirror reversing camera, recently we have noticed that after a trip the mirror monitor shows a blue screen and says no signal. By the morning it is normally fine until you drive again, I have split the connection near the mirror and rear camera and at the back there is live feed when the camera is working. Where else can I look for a bad connection? Or could it be a whole new replacement cameras?