Revert C52 control board (zynq 7007) to S17 firmware ?

[nicky72]

I have a C52 control board I used in a test fixture.
I did by mistake uploaded the S19 firmware on it and cannot use it anymore to test the boards...
Is there a way to revert it back to S17/T17 firmware ?
I tried to just copy in the SD the S17+ firmware but it does not work?
Is there a different way to flash the S17 firnware content using the flasherase and writenand commands if I can gather ssh access to the board ?

 thanks

[BitMaxz]

Have you tried other firmware to revert it back to the original firmware?
Try more firmware to bypass the signature check.

Try the guide and firmware here: https://www.zeusbtc.com/articles/asic-miner-troubleshooting/1183-s17e-t17e-s17-plus-t17-plus-control-board-program-recovery

If it still doesn't work, try other firmware like Braiins or Vnish firmware.
Or the test fixture firmware provided by the seller.

If nothing works then your last hope is to flash the controller via pinouts but the problem is there's no guide about it.
However, try this old method here below lets see if it would work on c52 control board.

- https://bitcointalk.org/index.php?topic=2386296.0