Spare power adapter saves the day

Tablo OG 2-tuner was not reachable, and had rapidly blinking blue LED.
Power cycling, pressing the reset button, and disconnecting its hard drive, made no difference.

Plugged in a spare power adapter, the one sold via the TabloTV website, and the Tablo began to function properly.
Ordered 2 additional power adapters for my other 2 Tablos… just in case.