Flashing Lock Flag Is Locked Please Unlock It First Full [better] Jun 2026

This message often appears when:

Lock and unlock the bootloader | Android Open Source Project flashing lock flag is locked please unlock it first full

Turn off your CNC machine and the controller board (e.g., Arduino Uno with GRBL). Wait 10 seconds. Power back on. This clears the volatile lock flag memory. This message often appears when: Lock and unlock

Press and hold the Child Lock button, or hold Delay Wash and Pre Wash together. flashing lock flag is locked please unlock it first full