ِDear BitMaxz,
Thank you for your replay.
I did not only reset it to factory (from maintenance menu) but also by pushing the reset button. I can change it's firmware version to any version of E9.I'S but not to E9.3 (as you append it)
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Well, if it doesn't work I think there's no solution yet that can solve this issue. When searching about ebang machines related to your issue the same issue as yours I can't find that they solve or revert back their firmware to original firmware.
What I think is try contacting ebang support and maybe they can help to solve your issue.
You can contact them with their skype.
skype:
ivy@ebang.com.cnskype: lynnnesnay
skype: tammyni03
The only thing that I notice about the firmware of E9.i and E9.3 is they have different firmware extensions.
E9.3 extension is .bin and the E9.i is tar.gz. So I think you can bring it back to E9.3 if you can find a firmware with tar.gz extension.
Here check this one I found my old download history of this firmware
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http://miner.ebang.com.cn/upload/miner/cms/btc_upgrade_9.0.0.20.tar.gzIt might be a 2019 firmware as the download date. The name is "E9.3 Firmware version number: Firmware –9.0.0.20" so this is the right firmware.
I hope it will work if not better try to contact them.