LENS COME OUT WHEN YOU TURN IT ON AND THEN IT GOES BACK IN

There is an internal battery that you cannot change. When it goes out, the camera fails. There are several places online that you can send it to for repair

There is an issue with the camera focus circuit in lens. That is why it is ok when you go into playback mode but negative when the lens is involved.

It would appear to be the battery or the battery contacts. Clean the contacts on the battery and recharge the battery. If still does not charge then get a new battery

It appears that the camera lens is off track.
Since the camera is not working right you can try these things.
First, just to tell you, that by doing the following you could damage the camera further, so take it at your own risk.

What I have done in more than a few times is to examine and watch closely to what happens to the lens as it goes through it's process of in and out. This usually indicates that the camera processor is trying to get the lens to adjust to it's correct place. This is most time the result of an impact of some sort.
What can be done?

As you turn on the camera carefully hold the lens back with something flat or simply hold on the sides of the lens to cause it to reset to a new position. Turn the camera off.
Try to turn on the camera and see what happens and if there is any change. This will determine if you need to try again and go through the same process.
By continuing the above, it may be possible to get the lens back on track.
To tell you... most lenses are made very similar for digital cameras. The extension tubes of the lens is attached to some kind of small tracking devices. This varies, but all will track in a small groove to the fully extended position.
What we are trying to do is to reset the gear position to where the camera processor will know by the sensors that the lens is in the correct position. Also to remember that there are very small gears which can break with too much pressure, but also can "jump a notch or two" to reset it to the correct position. Speaking of that... if there is a grinding or jumping sound (when starting with out any back force)...like stripping or sounds of broken gears..then trying to reset the lens will not work. In which case if may be better to sell the camera for as is or parts on a site such as Ebay.

Do a system reset. Also, make sure the battery is fully charged. Pull the battery out then replace after 30 seconds.

Get it repaired under warranty. Sounds like a logic circuit problem.

Not sure about the battery... that could be it and I haven't tried switching it out for a new one yet, but in the meantime I am getting around this problem my grabbing the lens with my fingers and "helping" come all the way out... just give it a little pull, a little encouragement and it will come all the way out... but the trick is that you have to do it right after you try to turn it on and before you get the beeps...

So if your lens is stuck out right now and the camera is powered off, then turn the camera on and then pull the lens out before you get the beeps... once you give it a little tug, the mechanics should take over and it will extend all the way... the LCD will come on and you'll be good to go...

Like I said, I'm having this problem too and my girlfriend suggested we change the battery... I guess that's possible, that the battery is not holding enough of a charge to push the lens all the way out... I'll investigate how much a new battery costs and then determine if I think its worth a try...

Please eject camera battery and clean with a pin your battery tip in your camera with care fully.

Hope its helpful to you

did you push in the battery all the way so it clicks? I forgot to do that at first. =\

Sounds like the lens can't get into the proper position. Any possibility of damage to the lens?