There is something i forgot about when i postet about the second board:
There was a spot of solder from the production, between C70 and C46, which i removed before i connect something to the board.

Here is a photo including the serial sticker on the processor.

To the problem with the blown driver: What can cause this damage? I've checked the wires, the connections and the extruder motor several times and can still not find an issue with these. I did never disconnect a motor, while the board has power.

Thats right, the last symptom was the driver was not working.

This time the driver works, but generating a strange noise on the motor in low speeds.

I've tried that now, just with a simple cube in vase mode. It prints with E0, but with this strange noise. I've tested to higher the extrusion speed, without a hotend. At about 60mm/s the noise disappears.

Not sure if its the same fault, with the first board the motor was not moving, but now it moves with strange noises. When its idle there is a high pitch noise, but just with E0. The motor is rated with 2A, i also tried lower currents.
With the motor configured to E1 i have already tried to print, and it works so far. But with configured to E0 i just extruded filament, in the video i have filament loaded and disconnect the bowden tube of the hotend side. The moving direction is correct.

I used the default values, but i also tried the defaults on driver 3.
I just changed it to M584 X0 Y1 Z2 E4, whitout the line M569 P4 S1.

I've tried another motor, the noise is the same, when i change it to driver 4 it works perfekt.
Did i get another board with an faulty driver?

Yesterday i got my replacement board. Now the driver 3 is working, but with strange noises. When i configure it to driver 4 it works normal.

I uploaded a video from it:

https://youtu.be/e1qOTnp0OQM

My config.g for the drives section:
; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M584 X0 Y1 Z2 E3 ; Apply custom drive mapping
M350 X64 Y64 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X320 Y320 Z1600 E90; Set steps per mm
M566 X480 Y480 Z30 E120; Set maximum instantaneous speed changes (mm/min)X2400 Y2400
M203 X48000 Y48000 Z180 E12000; Set maximum speeds (mm/min)
M201 X2000 Y2000 Z500 E250; Set accelerations (mm/s^2)
M906 X1800 Y1800 Z900 E1800 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

Hello,
i have a problem with my duet wifi board. My driver 3 seems not to work. I configured in the config.g "M584 X0 Y1 Z2 E3" and my extruder doesnt move, when the hotend is heated up. When i change it to drive 4 with changing the wiring too, then i can move it. I've tried a different motor with another cable with the same result.