The above quote is, as I mentioned, is how I understood it. I'll probably never know exactly what happened.
Unfortunately, I left the room having checked the light was flickering.
(Hadn't loaded HDi leds yet.)
The whole operation was kick-started by my running Spiroform's defraggle. The computer shut down on a timer while it was running! I know . . . should have known better. It caused an unrecoverable fault.