It sounds like the 'overlight' head is damaged or bent away from the mech.This happens when a disc has been forced in or somthing heavy has been placed on top of the unit.Its not a repair you can do yourself.If the 'head' is damaged it will need replacing.They don't come cheap!But if its just bent it should be repairable........Good luck........Gordon
gkshepherdelectronics@sky.com, February 2009