@jens55 I just marked it with sharpie as i expected it to be dead before i marked it, it had the same colour as the rest.

If you need more pictures let me know

Of this area or the whole board ?

@phaedrux

1. only the duex steppers dont work
2. The duet 2 is responding when connected to the USB and gets recognized in the device manager in COMs
3. only visible damage is one of the pins is melted but no chip is visibly cracked or damaged in any other way

@lopu After connecting to USB and running for few seconds there is big source of heat from direction of chip U8 (SX1509B according to schematics from github)

I have accidentaly shorted one of the fan outputs. Connected steppers don´t work, did i just fried all the stepper drivers or some mosfet or cap ? Only thing connected that works is Bl touch.
Thanks for any help.