Hi
as with previous lens problems the lens guides are out of allignment and there are a number of potential fixes on utube --- my experience is that only a small percentage will work but as the camera value is probably less than the cost of professional repair you may as well try
Ps I have had sucess with gently grasping lens before it retracts an gently rotating it until it locks back in guides
cameras with this fault are still bought on e-bay
Good luck
pc6493
November 2009