If you are looking for a factory firmware that could bypass ASIC check then there is no factory firmware that you can find here or even in Bitmain's support page.
You can only bypass the ASIC check if you install a modified firmware try to check the BraiinsOS you can able to bypass those broken chips.
You can find the official thread here
https://bitcointalk.org/index.php?topic=5036844.0Thanks for the reply. I have tried brainos, but the chain doesn't appear in the dashboard. On stock firmware, it appears but not hashing as the board shuts down because it has 77 asic instead of 78. Care to explain if there are other settings I need to set or something ?