I assembled a board in Arduino for the analog and digital signals, I use the Adapter (CAN / LIN), everything is working ok, such as arrow, handbrake, RPM and Speed port, and others through Arduino via wires, also an OBD2 LM 327 for some ECU functions that do not work on Arduino, such as Temperature, Battery Voltage, but the problem is when the Arduino board is turned off by the positive wire and the timing turns off the panel, which is the multimedia, when I open the car door again, the door switch is activated, causing the multimedia and Arduino to turn on again and load the dashboard screen using RealDash. That’s where the problem lies. There is some configuration in the RealDash application that is not letting either the Arduino or the multimedia crazy, which is not letting the dash screen load again, only entering a dark screen as if nothing had been loaded, but bugging the dash to be loaded. If you leave it for about 2 minutes, when you turn off the multimedia and Arduino, the screen loads again. normal, but when turning off the multimedia and arduino and at this moment opening the door the screen comes black without the dash, you have to leave this time for it to load normally again, there must be some configuration in the multimedia or realdash that is enabled that is preventing the screen from loading normally again when turned off, I would like some tips from the most experienced