Bitmain antminer L7 control board replacement parts Antminer L7 control board, also known as L7 data card motherboard, can be used to collect and process the data returned by the hash board. The control board is a component that is prone to failure during the mining journey. Timely replace the damaged Antminer L7 control board can reduce losses and allow the miner to resume operation in time. Fully stocked and fast delivery.