My old friend came over today and examined the credit problem.
After a half an hour, we decided to check the cockpit from below(sorry for the bad quality pics)
We found 4 wheels, tons of spiderwebs and a cut wire.
After fixing that, the game started and runs great!!!
It has awesome sounds, cool gameplay, a working tachometer and led displays.
There is only one thing that is maybe not perfect, the clock in the top of the screen always show 90 and it doesn't start the countdown.
Anybody have some idea, if it is a setting problem or something else?
Unfortunately my Gf. broke my camera and I can't make a video atm., maybe I will try it with my handy, but I guess the result will be the same like the pics in this post.