My system worked until the sonos app was upgraded. (Orange to black icon)  An Ikea book shelf and ZP100 were upgraded and continue to work, but 5 products have become disconnected. Yes I've tried rebooting. Resetting, direct network connections and dhcp address allocations and downgrading (but downgrading capability has been removed) I have a bunch of sonos products with green flashing light that are  available to "connect" but can't register in the system.

Any suggestion or do I throw them away?