MyBook Live Duo stuck in sleep mode

My WD MyBook Live Duo has stopped responding and keeps itself in sleep mode. I can see it gets power because it blinks blue in front, but I cant access the drive on the network or any kind of settings.

That’s not “Sleep”. The drive is still responsive in sleep mode – it’s just spun down.

But it should still respond to Pings, mounts, etc… so something else is amiss somewhere.