Hi I have an ELRO wireless reversing camera and screen. Since parking the van up 6 weeks ago when the camera was working fine I have now found that the camera is not working correctly. When switched on I get the initial fuzzy screen and two small blocks of fuzz ( this was normal before ) then the screen goes black. Any ideas? the set up was brand new with the van ( Roller Team Granduca on Fiat x2/50 ) two years ago.