Feedback about: HELP! Uploaded WRONG Firmware to Control Board May 9, 2020 at 2:04 am #10806 @knowltonjayne oh no! I only just saw this. Prusas have two reset buttons: the factory reset process (which I think you did: front X button plus the dial button, as detailed here: [Factory reset](https://help.prusa3d.com/en/article/factory-reset_2216)) plus the indent next to the USB port. Prusa claim it’s impossible to delete the bootloader firmware, so if these don’t work, try their technical support.