Thanks for your reply Drax, so I succesfully entered in rcm mode, I have an USB to USB C cable (the one that comes with the Controller Pro) I connect my Switch through it to the computer right? I've installed TegraRcmGUI in windows, but not sure what to do from theresince there's no text in the Switch...Booting into RCM doesn't turn on the system normally. If you've successfully booted into RCM, it will look like a black screen. Also your serial number has no bearing on whether or not you can enter RCM because even patched units still enter RCM. The only reason we know they're patched is because they fail to accept payloads in RCM.