Dorthy, one other thougt most scanners have a "lock" that keeps the important stuff (technical term) from moving around while the unit is being moved. Might find it and check to see if it has been moved to a partially locked position. Would guess you have powered the scanner off and back on. When you do does it do anything other than the green light coming on? The light should move as it gets into position, even when not connected to a PC.

Yep Ann! May be the home of APUG, but in this case this is a valid question I think....Sean, any comments?