Just to help others in that i suffered from power loss when i thought all was switched off. The "electrics cupboard" pictured from my Miami shows all but if you look to the left and right of the Red and Yellow plugs on the lower right hand side you will see Two small rocker switches, these were the culprits. They allow power to my 10" combined TV/Reverse monitor, reversing camera and the CD/DVD/Tuner of which all were happily fully powered (no warning lights etc) 24/7. Off course there is nothing in any manual so i found out the hard way. I hope this benefits somebody.