I have an S6 v1.2 board. I recently updated my PSU to a 24v one, that and the hotend resistor were the only changed components. Since I did that, the serial connection to marlin fails with errors like:
Could not connect to COM4 at baudrate 250000:
Serial error: Cannot configure port, something went wrong. Original message: WindowsError(995, 'The I/O operation has been aborted because of either a thread exit or an application request.')
DFU programming fails too if the board is connected to the PSU. If I power the board exclusively with USB or if I go back to 12v all is perfect. How can I solve this?