Brown-out protection?

[thumb5]

Normally, if I power it off and on again, it immediately goes through the start-up process and is ready to play. If left, it would then go to sleep after 40 minutes (in my configuration); in that state the display is lit dimly, and it will wake up when the front panel button is pressed. So this was definitely something different.

(If it always went from power-on into the state it was in yesterday, I'd never be able to use it!)