Searching for the IBus Code to start the MID

[Facelift]

Hello,

I have a little problem. A few years ago I build in a bmw navigation computer (mk 4) into my car. The MID (which was in before) went into my room. After the retrofit my dealer coded the navigation computer to the car.

So everything's fine for about 3 years.

Now, a few days ago, a friend of mine like to buy the MID. I tried it (the MID connection cable is still in the car), but it did'nt work. So i went to the bmw dealer to connect it to one of their e39's.
It worked, but had some pixle errors.

Perhaps it does'nt start in my car, because the car is programmed to start the nav computer. And don't talk to the MID anymore.
I have a laptop and a interface. Does anyone know the command to turn the MID on?
I like to repair it. But of course it should work before.