Check whether there is full chips from kernel log.
If missing chips,do single-board test.
If the chip's hashrate is low, replace it.
Check the 3 hashboards temp sensor model,keep them the same.
Keep power on the hashboard,test the voltage of RI,BO,RST,CO,CLK to find out the abnormal chip and repalce it.
Or the temp sensor error. Configrate the right temp sensor file.
The control board or hashboard is broken, or the eeprom data is deleted. Program the eeprom data with code editor and then do the single-board test with the fixture.
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