It's an "screen inactivity" blanker: it watches the screen for periods of 100% stagnancy, and then blanks the screen after the user-specified period of stagnancy. This means it WILL operate even when the player is running, but only if the screen never changes (no timers, counters, visuals, scrolling titles, etc..).

May I suggest that the screen blanker be made into one which is based on the last keypress (from front panel or remote) instead of based on the screen-scrape?

I could go into a long discussion about why I think it's important, but I thought I'd just try rubbing the lamp first.

Also: The number of seconds of inactivity selector: Could it be in MM:SS format instead of SSSS format?