The LCD is swapped (with the related wiring and DSUB9 female), because first wiring seemed to be contact-wise buggy.
The buggy LCD loom is under investigation, there is no easy-to-spot visible problem with it, but it still has a problem.
Seems like the new wiring works great.
But i still have some starting/running problems if the ECU is wired to the Laptop (i think this is caused by the USB to Serial adapter).