Difficulty in retracting lens

This can happen when you use a battery that is almost without charge. Please remove the battery and charge it, before placing it back. Then be careful not to touch the lens, till the camera has a chance to retract it.
After you place the battery the lens should retract.
If the battery is really charged. You should not think it is charged, because you had it on the charger till the light indicated battery full.
There is also a chance you stopped the lens while it was coming out. A sensor detected this. To avoid damage to the lens construction, the camera switched off automatically. Also remove the battery and after a few seconds replace the battery and switch on the camera. Careful you don't touch the lens again.

Lens needs to be replaced

Your problem may be due to 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, the camera may have a problem that requires professional repair.

Next to the eyepiece is a diopter adjustment. This allows you to focus the viewfinder just for your eye. The camera lens is not affected. I can adjust the diopter and shoot without my glasses haveing to be on.

sounds like you have dust, sand of some type stuck in the retracting lense. Ive found someone to tell me to take out my batterys and SD card, then tap the bottom of the camera on a table top. Replace the batteries and power up. Doing this, I was told it loosens up the debri for the lense to retract to close and to open again.

I have fixed my g9 twice with the lens problem. 1st time I dropped the camera on asphalt lens closed. Turned on, lens stuck and not forcusing or retracting. Solution was to press lens against a door frame and push as I turned off the camera...it worked. The next time,the lens was extended and would not retract I had to place the camera on its back on a book while I used a small block of wood and a small hammer. It worked camera is working fine. After both cases, it took about 5 shots to calibrate the auto focus.

you need repair lens or change lens ,I can repair or i can sell this part okay

Lens gets stuck and wont take pictures. Turn back on and it says retry power on. Thats helpful. :(

Never buy a Canon camera again. I have the same problem, and sorry that nobody has a solution. This is the worst of the 3 Canon digitals I have purchased. Lack of a view finder makes it impossible to preview shot when outside on a bright day.

A new camera will fix problem perfectly. LOL Did you drop it? Seem like there might be a short or something similar. Had U ever play the game "Operation"? This camera need it, of cause done by the pro. LOL