Hi, to my knowledge, only firmware before 2020 can be unlocked by a remote utility, so asicTO utility (works very well) or Awesome miner (also works very well via the command "Send custom:" unlock "to unlock ssh) ...
We have also experimented with a bitmain firmware from 2020/04, and the unlocking worked very well with the SD card despite the recommendations, but to be taken with a grain of salt, we only tried the T17e ... You can try it. SD card in this case, you do not risk anything. at worst nothing will happen and you will keep the firmware currently installed. PS: "my" SD card file is compatible with all 17 series without exception, and also for all minors with the C43 control card (for exemple : s9k, s9se, Z9/11 and more).
Regarding my firmware, try to unlock it with a utility, and try to install my firmware, if that doesn't work you must use the SD card files that I placed at your disposal in the first post, once the firmware is installed, if it does not suit you, no problem to go back (Philipma1957, Favebook, and me will confirm you) it is to say install bitmain, or vnish, or other!
Bruru : If you want help, i need screen of your ("System / Overview") for i understand what firmware you use actualy
I remind you that I am available for any request about my firmware, and I am as transparent as possible, do not hesitate to send me a PM if you want a quick response;)
Ps : HS , today was the big day for me! very stressed, a great first for me, this morning I had an operation for the removal of the gallbladder. Everything is fine, everything went well, I hope this will continue! I have 30 days of rest to respect, no physical effort.