Printer not responding after upgrade

Hi this concerns the jgaurora A5, bought 2 weeks ago. I did a stepper driver motor update following the youtube of DaHai: https://www.youtube.com/watch?v=d6lRvYPSY7A . After that everything started up but I couldn't move any of the axis throught the panel nor did anything happend when trying to print something (both the bed and extruder remained at 0C). I've reverted everything (including flashing stock firmware but the problem persists. Does anyone have a suggestion on how to proceed?edit: some additional info:- when i change the fan speed on the lcd panel I hear it change (so that works)- when I hold the extruder (usually not wise I know) I see the temp indicator on the lcd go up. its specifically the x/y/z/extruder and both heaters (extruder and bed) that dont respond. Any help in the direction of software, tools, tips and tricks to pin point the issue is most welcome.