> I should have been more clear - the monitor never goes Energy Saving
There's a utility you can download called "wizmo" and one of its
features is "monoff", which instantly puts your display adapter into
energy saving mode (by suppressing both vertical and horizontal sweeps).
This might help you deduce what's going on, and what isn't.
I've found that having media playing (even if it is paused) will often
stop my display from reaching power-saving mode.