Hello everyone. I have a 2005 s type 4.2 with navigation. The screen keeps going out black frequently and I was trying to get some info on where to find the module that controls the screen, so I can start diagnosing it. Some times it lets the radio works but if the day before I turned the power off then the next time I switch the ignition on it wont allow any function like radio or a/c controls. Thank you in advance.