When the Avalon 1246 kernel log shows hash board 0, the control board cannot recognize the hash board. You can solve the problem by the following methods.
1. Check whether the hash board cable and 1246 control board are damaged. If damaged, replacing the new hash board cable and control board directly is recommended.
2. Do a single board test on the hash board, check one by one, check the faulty hash board, and replace it.
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>> How to troubleshoot the Avalon A1246?