Audi EDC16 repair water damage

There is EDC16CP34 with small water damage. Which cause car cut off on motor way and non-start after that any more. DTC codes only about injectors. After unit repair and track down one damaged internal pcb track, car engine started with no trouble codes. Sorry one part of video missing where i searched missing track forgot to press record button. HW: 4L0907401 SW: 4L0910401M 0281013689