The Num Lock light on my keyboard
has been on for about a week because unplugging it and plugging it back in didn't work, and I couldn't be bothered to look up how to change Num Lock state.
I finally did — it's Keypad + 7. I turns out there is a tiny "Num Lk" label on on the side of the key.
The Num Lock light is the new VCR clock blinking "12:00".