I attempted to install a single good board and same thing. I assume its not possible to run these machines on a single board.
Instead of installing the broken hashboard better remove it and try to run the two working hashboard it should be work but if not then you will need to install a custom firmware like Braiins OS as suggested above to be able to bypasss this issue.
If you don't know how to run the Braiins OS on the unit without SD card slot you can try OTG drive to boot Braiins OS check the link below.
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https://support.bitmain.com/hc/en-us/articles/4404919472281-S19j-S19j-Pro-control-board-program-recovery-SD-card-flashing-Its hashing fine with the 2 good boards that are in there.
I posted here in an attempt to get the 3rd working.