If it's dark, nighttime, and you go into the Dimmer menu and turn it all the way down, do the display pixels:

A) Disappear completely even before you get down to zero?

B) Remain so that they are faintly readable even when the dimmer is all the way down to zero?

If the answer is A), then you might have a defective unit. Check out the FAQ entry on this subject.

___________
Tony Fabris