Installed a new hashboard on my s21 and get this error in log

[Emily.darryl]

===========================================Miner log===========================================
2015-01-01 00:00:15 Open miner sn file /config/sn error
2015-01-01 00:00:15 Open miner sn file /config/mac error
2015-01-01 00:00:15 Miner compile time: Thu Feb  6 17:18:15 CST 2025 type: Antminer S21 sn : mac:
2015-01-01 00:00:17 This is fix-freq version
2015-01-01 00:00:17 Miner compile time: Thu Feb  6 17:18:15 CST 2025 type: Antminer S21
2015-01-01 00:00:17 commit version: 3c182d4d 2025-01-16 15:11:29, build by: jenkins 2025-02-06 17:39:40
2015-01-01 00:00:17 opt_multi_version     = 1
2015-01-01 00:00:17 opt_bitmain_ab        = 1
2015-01-01 00:00:17 mid_auto_gen          = 1
2015-01-01 00:00:17 opt_bitmain_work_mode = 0
2015-01-01 00:00:17 port 439 already exported
2015-01-01 00:00:17 port 454 already exported
2015-01-01 00:00:17 port 440 already exported
2015-01-01 00:00:17 port 455 already exported
2015-01-01 00:00:17 port 441 already exported
2015-01-01 00:00:17 port 456 already exported
2015-01-01 00:00:17 port 438 already exported
2015-01-01 00:00:17 port 453 already exported
2015-01-01 00:00:17 port 446 already exported
2015-01-01 00:00:17 port 445 already exported
2015-01-01 00:00:17 Note: front fan is power on!
2015-01-01 00:00:17 Note: rear fan is power on!
2015-01-01 00:00:17 start the http server
2015-01-01 00:00:17 httpserver:6060 started ok
2015-01-01 00:00:17 load machine BHB68601 conf
2015-01-01 00:00:17 machine : BHB68601
2015-01-01 00:00:17 get test_loop_securely_find_asic_num failed
2015-01-01 00:00:17 abandon mix board!
2015-01-01 00:00:17 get mix boardname[0][BHB68601], name:BHB68601
2015-01-01 00:00:17 bad chain id = 3
2015-01-01 00:00:20 bad chain id = 3
2015-01-01 00:00:22 power off
2025-06-11 15:11:22 ==========================capability start==========================
2025-06-11 15:11:22 board num = 3
2025-06-11 15:11:22 board id = 0, chain num = 1
2025-06-11 15:11:22    chain id = 0
2025-06-11 15:11:22 board id = 1, chain num = 1
2025-06-11 15:11:22    chain id = 1
2025-06-11 15:11:22 board id = 2, chain num = 1
2025-06-11 15:11:22    chain id = 2
2025-06-11 15:11:22 ==========================capability end============================
2025-06-11 15:11:22 chain num = 3
2025-06-11 15:11:22 i2c chain = 0, master = 0x0, slave = 0xa0
2025-06-11 15:11:22 i2c chain = 1, master = 0x0, slave = 0xa2
2025-06-11 15:11:22 i2c chain = 2, master = 0x0, slave = 0xa4
2025-06-11 15:11:25 load chain 0 eeprom data
2025-06-11 15:11:29 load chain 1 eeprom data
2025-06-11 15:11:32 load chain 2 eeprom data
2025-06-11 15:11:32 eeprom load ret:0
2025-06-11 15:11:32 get a different board name for chain:2, pre board_name:BHB68603, current board_name:BHB68606
2025-06-11 15:11:32 eeprom not find board_name!!!
2025-06-11 15:11:32 create thread get_nonce_and_register_thread
2025-06-11 15:11:32 ERROR_SOC_INIT: soc init failed!
2025-06-11 15:11:32 reach max restart times
2025-06-11 15:11:32 stop_mining_waiting: soc init failed!
2025-06-11 15:11:32 cancel thread thread_id_rd_nonce_reg
2025-06-11 15:11:32 ****power off hashboard****
2025-06-11 15:11:32 power off

[Emily.darryl]

Before I installed the new hashboard, I had 2 good working hashboard so I just disconnected the data cable to the third board that was bad. So I ran with 2 boards for several months without any issues, just at lower TH like 135 rather than 200.

The new board can in and I installed it and flashed the control board with bitmain firmware and the above log is what I get. I am not able to get braiins to load on there for some reason, when I go through the toolbox the compatibility check fails so it wont install it.

I have an original amlogic control board in there.

Thanks for any insight. I have tried everything I can think of.

[Emily.darryl]

Just to update my issue. I resolved it by flashing s21 miner back to 2024 version of bitmain firmware then loading braiins frimware and all is working. The new board is rocking. I will post the new log to see if we can see why braiins worked but bitmain would now work with new board.

[mikeywith]

2025-06-11 15:11:32 eeprom not find board_name!!!

In plain English, the new board you bought is not compatible with the old ones, and thus you will have to use a 3rd party/custom firmware or get yourself a tool that can rewrite the EEPROM, like PICkit because the default firmware needs to read the voltage from the EEPROM, unlike Braiins firmware.

I haven't checked in a while -- but the tool costs about $200. So it could be cheaper to just pay the fee for the custom firmware.