I have a lens error. It won't open when the on

If you have recently dropped the camera you likely damaged the lens tube (housing) or jarred the zoom mechanism off of its track -- both problems that will require professional repair. If the camera has not suffered a drop, your problem may be due to weak/worn out batteries or corrosion on the battery contacts inside the camera which can prevent the full power of the batteries from flowing into the camera. Try this free fix before you do anything else: remove the batteries and wipe the camera contacts firmly with a dry cloth (heavy corrosion may require cleaning with a wire brush, steel wool, or sandpaper). Remove any residue that may have fallen into the battery compartment during cleaning, then wipe both ends of the batteries and place them back in the camera. This cleaning clears the problem about 90% of the time. If it doesn't work for you, chances are that your batteries need to be replaced because they're just too worn to properly power the camera.