For the last week or two my monitor has not been powering off as it is set
to do in Power Options. In the past this has been cured by changing the
setting (e.g. arbitrarily selecting 15 mins instead of 20 mins) and
re-booting my XP PC (a fairly rare event, as I like it on pretty well
permanently). But lately that's not fixed it.

Any ideas please?

--
Terry, East Grinstead, UK