I recently purchased a control board that said it would work with my R4, It's a ZYNQ C41 IT has the S9 firmware installed. When I go to flash it with the R4 TAR.GZ files, it gives me an error. I am not sure if there is a different file I can use to flash it or make a file for a bootable SD card. The files on Bitmain don't seem to be files I can use to boot from the sd card. Any help is greatly appreciated! I don't think this should be this complicated. Thank you in advance.
Yeah as mentioned by Artemis3, you should follow these exact steps :
S9-Control-Board-Program-Recovery
Once done you just need to flash again your board with the R4's firmware (from the GUI).