Radio works intermitantly. Screen displays blank red or black but no display. Sometimes it works sometimes not. If it does work it is fine until I turn off the engine then usually doesnt work again, sometimes for weeks. I have had it out and checked the connections and they are fine. Could this be a problem with the management system. I am tearing my hair out with this now as it has been doing it for about a year. My other problem is that just lately the boot open light keeps appearing when I know the boot is shut. This is also affecting the remote locking system in as much that the indicators do not flash when locking the car. Any help would be greatly appreciated.