SIST

Hello friends of the mechanics in general;
The fact is that I have a BMW 330D imported from Germany topped here and a while ago since I will paint it in the SOBMW, I started to fail the screen of the central navigation console and the case is that the liquid display is not damaged and lightly illuminates but the characters and information do not appear. The navigation module that goes in the trunk in the trunk in the luggage Red LED and even a friend has put the diagnosis in the calculator connector housed at the top of the motor habitac (looking at it with the defrant and open cap) and does not establish dialogue.
What do you think is? Also the companion seat airbag has been fixed since then and it gives me to think ... ummm