Hi, Does anyone know if I can flash the Ender 3 Motherboard V4.2.2 outside the system i.e. without the Stepper Motors and heaters connected. I've ungraded my Ender 3 with the V 4.2.7 Motherboard and Touchscreen, but I want the old one as a spare. I power the old Motherboard up with the old screen connected via the 24V System PSU but the display does not power up. Many thanks Martin.
