[Dr_C2]

First diagnostic steps are easy.

1/ Disconnect the wires to the motor and insulate both using PVC tape or similar.
2/ Place the car on an SSD powered track with a lane changer and set its flipper to the ‘lane-change’ position.
3/ Manually roll the car across the sensor of the lane changer. Does the flipper switch back to the ‘stay straight’ position?

If yes then the microcontroller is running normally which would be good news.

If so the next step would be to remove the two MOSFETs (motor and brake) labelled NO2 and PO3.

Then first only refit a new NO2 and test for correct function of the motor (but no brakes).

All being well then refit a new PO3 and this should bring the brakes back too.

As a side note, it is critical with the C7005 to ensure none of the circuits on the decoder come into contact with anything conductive e.g. the motor casing. Insulating tape is your friend.

Good luck!

c

(BTW from the photos PO3 looks damaged - but likely NO2 is damaged too).