The new Antminer L7 hash board is used to repair and replace the old, faulty Antminer L7 hash board. A single L7 miner has three hash boards, and a single hash board consists of 120 BM1489 chips. When the ASIC chip or hash board fails, the L7 miner cannot operate normally, and even the hash rate will drop. At this time, it is recommended to replace the faulty hash board to keep the miner running well.