Turn camera on, lens comes out, goes back in ,and says lens error.

Try these fixes

1.Remove the batteries from the camera, wait a few minutes. Put a fresh set of batteries back in (preferably rechargeable nimh 2500mah or better) and turn the camera on. If using rechargeables, and they're more than a year old, consider purchasing new rechargeable batteries as they may not be providing sufficient power to startup the camera. If new batteries didn't work, try pressing and holding the 'Function' or OK button while turning the camera on.

2.If the camera's batteries ran down completely while the its lens was still open, the camera may show a lens error or not start properly when new batteries are installed. Remove the memory card and keep it removed, then install the new batteries. When you turn the camera on with the card removed it may come back to life, as this triggers a reset in some cameras. Error E30 means that you don't have a memory card installed, so turn it off, slip in the SD card and turn it on one last time

3.Place the camera flat on its back on a table, pointed at the ceiling. Press and hold the shutter button down, and at the same time press the power-on button. The idea is that the camera will try to autofocus while the lens is extending, hopefully seating the lens barrel guide pins back into their slots.

4.Insert the cameras audio/video (AV) cable, and turn the camera on. Inserting this cable ensures that the camera's LCD screen remains off during the start process. Thus extra battery power is available to the camera's lens motor during startup. This extra power can be useful in overcoming grit or sand particals that may be jamming the lens. If the AV cable doesn't fix the lens error by itself, consider keeping this cable installed while trying fix 3 as a means to provide extra power to help to this fix. Reinsert the cable only after tapping the camera.