Did you apply the lock in the move? Take a look under the base- also check the manual. Failing that then one can only assume it has had a bump in the move. Depending on age you could try the makers- maybe a warranty hope there. Certainly the tech support may have some answers as may be here http://www.fixya.com/support/p168051-agfa_snapscan_e25_flatbed_scanner/solutions
Usually answered in minutes!