No response during flashing: Ensure the data cable is connected to the torso driver board interface rather than the head Raspberry Pi interface; try a different USB port or data cable, then refresh the page and retry.
Flashing interrupted or verification failed: Keep the entire unit powered on and close other programs occupying the serial port; select the port strictly according to the address mapping table.
Abnormal firmware behavior: Ensure the selected firmware matches this model series (do not flash firmware from different series), and perform a complete flash again. For more historical issues, refer to the FAQ "How to Update Lower-Level Controller Firmware".