A3 hash rate is low or a hash board is faulty

If you need to judge the hash rate of A3, please try to unplug the power, wait about 20 minutes, and then restart the miner.

Then please try to reload the firmware, load and run the miner for 20 minutes.

Reloading the firmware:

https://shop.bitmain.com/support.htm?pid=00720180209143414844tTh8x2o706B6

Please check the power supply and controller first.

To check the power supply, you can use a well-functioning power supply to test the miner. If you don't have another PSU, you can also check by switching the cables between the hash boards. If the problem is with the cable, the power supply may be faulty.

To test the control board, switch the controller cable between the hash boards. If the same hash board shows the issue then the hash board is faulty. If the issue follows the cable then the controller may be faulty.

If the miner still does not work, please test each hash board separately to determine which one has failed.

To test each hash board separately: keep the power supply connector of one hash board connected to the control board cable, and disconnect the cables on the other two hash boards. With the operation of the miner, you can see the status of the connected hash board.

Here is more detail:

https://www.zeusbtc.com/articles/support/1050-how-to-test-antminer-hash-board-one-by-one

On the miner status screen defective chips are displayed as "xxx", "---" or " ASIC≠60.