Welcome to choose Antminer L7 hash board ASIC chip B20, which is often used to replace faulty ASIC chips. The chip is a vulnerable component of the L7 hash board. When the L7 miner has 0 or low hash rate, the main reason is the failure of the ASIC chip. At this time, it is recommended to use the 2022 new version Antminer test fixture with touch screen. Detect faulty chips and replace them to keep miners back up and running quickly.