Drobo

No Drive Power up

Restarted my iMac today and the Drobo 5c failed to power up.
When I apply power to the 5c, the fan spins a short while then stops.

Power supply “cube” has green light.

Using the switch, nothing happens.
No Lights, no fan nothing.

Removed all drives, reinserted.
Nothing.
Removed all but one drive.
Nothing.

Any ideas or should I pitch it?

Thanks.
-jim