RBS750 intermittent light colors and backhaul connection

I have a RBR750 and RBS750 that I am trying to redeploy in AP mode.  The RBR750 is working fine (wifi and ethernet ports) but I can't get the RBS750 to be stable.  It is typically showing a magenta front light, independent of the backhaul status (as shown in RBR750 browser admin).  

Right now I am seeing a 'good' backhaul status (but it will cycle to 'disconnected'), the Satellite is showing as connected to the Orbi router, both have IP addresses (can log into satellite directly using browser), but the satellite is still magenta.  

I have power cycled the satellite and it will eventually show blue for about 30 seconds (sometimes a little longer) but then switch to magenta.  I have attempted numerous ways to resync them.  I have done a factory reset on the RBS750 (amber blinking power button light, wait 5 min until get solid white front light, do a sync).  I have tried both wireless and wired sync.  Both firmware shows as latest (and same) version.  

My goal is to get the Satellite stable on a wired backhaul connection so I can put it at the other end of the house to extend coverage (wifi won't go through that many walls, although I can't get wifi sync to work now for some reason, even though they were working together before).