S19 hashboard 2 not showing on antminer dashboard

Hello, my miner is running 2/3 at 75 th/s because hashboard #2 is down. Tried reconnecting the cables, using new cable, upgrading firmware. No avail…Is there a way to run this machine with this hashboard removed? I have two more,but the system throws error codes and won’t let the machine run without the Board connected. Is there a dummy plug or setting that can disable hashboard 2 so i can still mine while I send it out to bitmain for repair? Thanks in advance

Please provide any leads on hashboard repair centers In the US that you can vouch for. Bitmain will take forever and I don’t want to shut off the miner for the meantime.