Antminer L7 lacks hash board - L7 Kernel Log

When the Antminer L7 lacks the hash board (as shown in the figure below), the miner will not be able to perform the hash rate calculation normally and cannot perform mining. When the miners encounter this fault, they can refer to the following methods for troubleshooting.

Troubleshooting:

1. Swap the data cable of the Antminer L7 hash board that is not shown with the data cable of the normal hash board (only the hash board is replaced), and first eliminate the problem of the cable and the Antminer L7 control board.

2. Check whether the total voltage domain is normal. If it is abnormal, use a fluke 17B+ multimeter to check whether the PIC, MOS tube, and boost circuit are abnormal.

3. Measure whether the RI signal is normal. Generally, there is no need to check one by one. For example, in the middle domain, find the RI signal of a group of chips on the edge of the domain for detection. If it is normal, we will check forward; if it is abnormal, check backward ( The transmission direction of the RI signal is from the last chip to the first chip)

4. The general log and fixture detection display "ASIC=0 or NO hash board", which mainly checks whether the voltage of the chip's RI signal and the ground value are abnormal. If there is any abnormality, most of them are caused by the chip soldering. First, soldering twice. If it cannot be solved, replace the BM1489 chip with the chip failure.

Click the article below to learn more!

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