Download the firmware image from the manufacturer’s website and follow the flashing instructions carefully. Depending on your control board model, you may need to shift the JP4 jumper or short-circuit the AB to enable flashing using the SD card. After flashing, power off the control board, reset the jumper or AB to the original position, and reboot the miner. If you encounter any issues during the flashing process, try reformatting the TF, ensuring that the firmware is correct, cleaning the TF, or trying with a different SD card. If you cannot resolve the issue, contact the manufacturer or reseller for further support.