Romina not sure if you tried to check this out http://www.ifixit.com/Wiki/Sony_Cybershot_DSC-W5_Troubleshooting and see if any of it will work for you. Sometimes shaking the camera while pressing the power button or giving it a good whack on the side can solve the problem. here is also a good guide [guide|2318] for the lens itself. Let us know how it is working out. Good Luck.