Old drives in new Drobo 5N


My old Drobo 5N broke down (the disks are intact). I bought a new used 5N and put the old drives in. Drobo Dashboard on my Mac doesn’t find it. I have tried to do it according to instructions found on the web. I used ethernet cable directly to the Mac and plugged in to my router, but no difference.

Is there something else to do than just put in the old drives?