With balance at "0", enter the sequence on the remote. Firmware Upgrading: USB Upgrade: Standard method for software fixes.
I should also consider adding a troubleshooting guide for common issues that might arise when working with this schematic, such as power supply problems, communication issues between the controller and microcontroller, or noise interference.
Clocking, reset, and EEPROM
Note: Verify with your specific power board, as pin counts can vary between revisions (e.g., integrated PSU vs. separate inverter).