Zoom button broken

Hey, I have this camera with the same problem and the fix is easy! After taking it apart, I removed the rocker from the assembly. One of the little pins had broken off. I cut the other one off and then glued a small square block of plastic to it to create a larger attachment surface and switch surface. I then took my dremel and refined the shape of the contact points without cutting all the way through the plastic block. A couple of test fits later, the camera was back together and has not failed yet.

If you can pull the camera apart (carefully) and find the zoom switch it could be that the switch itsekf has jumped the actuator. I don't know what method your camera usues but most use a rocker type switch. On the underside of this switch would be a slot which when pushed one way pushes against a small lever of piece of plastic. Let it go and the switch centres itself taking the lever with it. Push the switch the other way and it moves the lever or plastic in the opposite direction. What sometime happens is the lever or plastic somehow gets on the wrong side of this slot. So it will only push the lever in one direction. What you'd have to do is remove the top of the switch and center the lever or piece of plastic and put the camera back together. If your zoom is 2 seperate switches then one of the swiches is either faulty, the pin on the underside of the swich is broken or there is a foreign object stopping the switch from activating. You should be able to tell which one it is simply by the feel of the switch. if it's loose and wobbles around the pin would be broken. If it feels stck then maybe there's something stopping it. If it does neither of these things it could be just a faulty button switch which means you're up for a complete switch cable assembly. Good luck putting it back together. Just be patient and don't force anything. BMW