Troubleshooting Common Problems in S9 Series Miners as Indicated by Kernel Log

Start with safety and logs

Power down before opening a miner, label cables before moving boards, and capture logs before repeated reboots erase useful evidence. Record model, firmware, pool, uptime, fan speed, temperature, reject rate, chain count, and the exact error text.

Confirm the fault class

Separate configuration faults from hardware faults first. Pool errors, DNS failures, bad worker names, overheating, weak power, fan faults, and missing hashboards can look similar from the dashboard but require different fixes.

Document the test path

Change one variable at a time and keep the before/after result. Note cable swaps, PSU swaps, firmware changes, pool changes, fan replacements, ambient temperature, and whether the fault follows a hashboard, control board, network, or power source.

When to escalate

Escalate to professional repair when there is a burned smell, melted connector, breaker trip, corrosion, repeated hashboard loss, liquid exposure, or a board-level fault that returns after a basic cable, power, firmware, and airflow check.

After the fix

Run the miner long enough to confirm stable accepted hashrate, fan behavior, chip temperature, reject rate, and pool-side reporting. A dashboard that looks normal for five minutes is not enough evidence for a recurring power, heat, or hashboard fault.

May 28, 2023 · D-Central Technologies · ⏱ 2 min read

Last updated: September 15, 2024

The Kernel Log records the operational stages of the ANTMINER and can be a valuable tool for troubleshooting common issues. To check the Kernel Log, enter the backend of the miner, click “system”, and locate the “Kernel Log” option.

Common Problems and Solutions:

1. Fan Error

If the miner’s fan is not functioning or cannot achieve the necessary speed, the Kernel Log will display relevant error messages.

Solution:

a. Verify the fan connector is fully inserted into the socket and that the fan cable isn’t damaged.

b. Test with a functioning fan. If the problem persists, replace the control board.

c. Reset the miner to factory settings.

d. If all else fails, return the miner to us for repair.

2. PIC Error

If the Kernel Log shows a PIC Error, there might be issues with the control board’s signal cable.

Solution:

a. Ensure the signal cable in the control board is correctly connected.

b. Test with a functioning control board and update to the latest firmware.

3. Hashboard Issue

The Kernel Log might show errors related to missing chips or hashboards.

Solution:

a. For missing chips, replace the PSU and ensure the miner is properly grounded.

b. For missing hashboards, check that the cables are in good condition and correctly placed.

4. High CRC Error Counter

A high CRC error counter may indicate instability in the chips.

Solution:

Reload the firmware and test with a different PSU.

5. Network Issue

Network-related errors could appear in the Kernel Log.

Solution:

Inspect the network settings, Ethernet cable, connectors, routers, or switches. Consulting with a professional network engineer is recommended.

6. Overtemperature Protection

If the miner’s temperature is too high, it will cease operation, and an error will appear in the Kernel Log.

Solution:

Refer to this article for detailed instructions on managing miner temperatures: https://support.bitmain.com/hc/en-us/articles/360008523893

7. Pool Connecting Issue

Errors connecting to the mining pool can also be indicated in the Kernel Log.

Solution:

a. Verify you’ve entered the correct pool address.

b. Ping the pool to check if it’s connected.

c. Test to confirm the network is functioning correctly.

As always, our support team is available for further assistance if required.

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D-Central Technologies is a Canadian Bitcoin mining company making institutional-grade mining technology accessible to home miners. 2,500+ miners repaired, 350+ products shipped from Canada.

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Editorial review and limitations

Reviewed by D-Central's mining hardware and ASIC repair editorial team for practical accuracy, buyer risk, repair context, and operational assumptions. Verify current hardware price, stock, network difficulty, BTC price, power rate, shipping, tax, firmware, and device condition before buying, hosting, repairing, or retiring mining hardware.

Last reviewed September 15, 2024. D-Central, Laval, Quebec.

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Last reviewed September 15, 2024.