3. Unzip the contents of the downloaded .zip archive to MicroSD. MicroSD card size must be no more than:
16 GB for S9, S9i, S9j
Larger cards may cause errors when flashing the control board
4. Disconnect the miner from the network, remove and completely disconnect the control board from power, hash boards, Ethernet network
5. You will need to short the pins on it to flash via MicroSD, as shown in this photo
JUMPER MICROSD – position of jumpers T9+ and S9, S9i, S9j for loading via MicroSD (recovery)
6. Now you can insert the MicroSD card into the control board slot and connect the board to power. Make sure the card is inserted correctly – on some MicroSD control boards, the slot may be upside down.
JUMPER NORMAL – position of jumpers T9+ and S9, S9i, S9j for normal boot (mining)