1.Issue: The miner has no hash rate. One of the hash board’s temperature exceeds 80 degree Celsius.

Reason: A piece of heat sink is loose or dropped off.

Solution: Remove the hash board that exceeds 80 degree Celsius to repair.

Note: If large quantity of hash boards temperature exceeds 80 degree Celsius, please add cooling devices, as the high temperature will ultimately go into the high temperature protection mode and the miner will shut down. Moreover, the miner can easily get defective when working in a high temperature environment.

2.Issue: The hash rate is good, but there is no temperature shown on the Miner status.

The hash board is easily burnt if there is no temperature shown for monitoring or when the real temperature is very high

Reason: The temperature detector is damaged on one of the hash boards that lead to the other two hash boards to have the issues on temperature display as well.

Solution: Test the 3 hash boards one by one by connecting to the control board and let it run for about 5 minutes, find the faulty hash board with temperature detection problem and ship it back to repair.

3.Issue: The hash rate is lower than normal. There is an “X” shown on the Miner status.

Reason: The ASIC chip is damaged, which resulted in the loss of some hash rate on the hash board.

Solution: If that hash board can still work well, you can keep and continue to let it work. There is no need to repair it unless the hash board becomes totally defective.

4.Issue: The hash rate is lower than normal. There are a lot of “X” shown on Miner status

Reason: The chips are damaged, which lead to the entire hash board running abnormally.

Solution: Remove the hash board to repair.

5.Issue: The hash rate is lower than normal. There are a lot of “-”  shown on Miner status

Reason: It may be caused by instability of the PSU voltage or a defective hash board.

Solution: Replace the PSU and control board-hash board 18 pin ribbon cable. If replacing didn't work, please remove the hash board to repair.

6.Issue: The hash rate is lower than normal. Some chips are lost. The hash rate is only running at 2/3 of the normal.

Reason: Chain scission of chips

Solution: Remove the hash board to repair.

7.Issue: The miner has no hash rate. There is X.X.X.X shown on the Hardware Version. Hash board cannot be detected. There is no information shown at all on the Miner status interface.

Cause: The firmware of miner is not detected.

Solution: Power off the miner and reset it. Reload the firmware.

8.Issue: The miner worked great when it was powered. After awhile, there is no hash rate.

Reason: One of the fans is not detected. Miner will work well only when both fans are detected.

Solution: Switch the control board connection between the two fans to find out which one is defective.

9.Issue: A large number of Antpools surfaced. Hash rate is normal. There is no use resetting the router.

Reason: One of the computers in the network has been infected by virus or malware.

Solution: Find infected computer and remove the virus or malware.

10.Issue: Miner can’t find IP. Red light flashing; Green light does not blink

- Reason：The Miner is not connected with the Internet.

Solution: Test the Internet cable, connection and the settings of the Internet (DHCP mode is required).

- Reason: The miner program has not started.

Solution: Reset the miner several times.

- Reason: The application of miner is lost.

Solution: Perform control board recovery

11.Issue: The miner doesn’t work after powering on despite changing the PSU.

- Reason: There is a short circuit inside one of the hash boards. 

Solution: Find which hash board is defective. Remove the defective part to repair.

- Reason: Control board failure

Solution: Change the control board

12.Issue: PSU can’t work when if the PSU fan is running. Miner works well after changing PSU.

Reason: The PSU is defective. The PSU fan is powered by a different output. The defect can’t be judged by whether the fan rotation power is normal.

Solution: Ship back the PSU to repair.

13.Issue: Miner restores to factory setting after powering off.

Reason：The software in BB board is damaged.

Solution: Perform control board recovery

14.Issue: Miners work well for several month before it starts to malfunction.

- Reason: The hash boards were corroded by humidity and lots of dust.

Solution: Remove the defective hash boards, dust the miner and reduce air humidity.

- Reason: Large amount of dust, resulting in congestion in the air duct. Heat can’t be dissipated. Catkins are likely to cause congestion in air duct.

Solution: Remove the defective hash boards, dust the miner and add dust elimination.

15.Issue: The machine is defective when network changed

Reason: Due to the network setup, miner can’t find the IP.

Solution: Power off and reset the miner.

16.Issue: S7 malfunction after running for a while. It runs again after rebooting.

-Reason: Temperature exceeds 80 degree Celsius and miner will automatically shut down.

Solution: Increase the amount of air flow.

- Reason: The PGA in BB board weld badly, which lead to miner’s shut down.

Solution: Remove the BB board to repair.

17.Issue: PSU can’t work but fan is running. All the indicators are off.

Reason: The control board cannot get power as the power circuit in IO board is damaged.

Solution: Switch the BB Board and IO Board with good miner to troubleshoot the defective parts.