I already tried different cables. I dont think the cable was the issue since Windoes recocnized the Duet correctly before killing the port. Nevertheless while debugging i killed the board while trying to measure 3.3V Rail blowing the 1A Fuse and killing the MCP. Any idea where i could get a replacement thought i am unsure of the exact tye it says 4403T 1661 375L. Still haven't found the reason for the original short. Anywhere i can get shematics for the board ? It was new and worked till i put it in a new case. Most likly i messed up the BLTouch Wiring.