Drobo disappeared from Desktop, won't reconnect, shuts down

Drobo 5D, a few months old with 5 4TB drives, being used for video editing via thunderbolt. Dashboard and firmware current.

It disappeared from the Desktop while rendering video to it. I can’t get Dashboard to see it unless I remove the drives.

On boot: solid Yellow & Blue drive and capacity lights for 1-2min, then Blue disappears, Yellows blink top to bottom then disappear, Yellow/Green blink while Blues flash, Green stays lit while Blues go left to right until all blue lit, shuts off after 1-2min.

Previously the 5D was in boot loop, and trying to fix via website instructions left it in its current condition.

Any advice appreciated.