IP address conflict.
Connect the miner's network cable to the laptop and check if you can obtain an IP address and access the internet.
Then,reconfigure the static IP address.
Check the miner status,there different frequency and no fan speed.
1st,eliminate the power supply as a possible cause.
2nd,try reprogramming the PIC of the hashboard with a frequency of 500. After reprogramming, the frequency should be 550.
3rd,do single-board test for the hashboard with 0 hashrate.
First check the fans. The fan error rate has increased, leading to a decrease in hashrate, and ultimately resulting in a network failure.
If changing the fan can't solve the problem, check the network again. If it still doesn't work, the CPU of the control board may be faulty.
If the PSU and mosfet are OK,it may be caused by
1\ The voltage configuration in the CONFIG file has been set the too high.
2\ The abnormal voltage domains or ground issues
3\ The abnormal signals
Is there full asic?
Replace the U22 and the capacitors,resistors,mosfets around it.It is possible that they were not completely replaced, resulting in a failure when powering up.
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.
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.