I'm getting a slightly different issue, but it could be the same solution.
Current Power settings:
Backlight timeout on Batt - 15 seconds
Display time out on Batt - 1 minute.
Now, it seems that if I lock the devce holding the red key down, it dims and switches the screen off in seconds, which is fine. But if I leave it unlocked, the screen dims in the correct time scale (actually 10 seconds instead of 15 but that's fine) , but it seems the display takes, well, it's getting on for 5 minutes now and it's still only dimmed.
So far i've installed:
Facade,
MS Live Search,
Smart2Go,
Resco Trial Suite
The current value of display in HKCU/CONTROL PANEL/POWER is 4294967295.
Is this value correct, or does it need changing to something else?
If it needs changing it may be a prob if it needs app unlocking as the cab I got from
http://spvunlock.rd.francetelecom.com/ won't run on my E650 for some reason.