How do I replace the iFN button?

The IFN button can be replaced if the original button seems stuck and the damage done does not critically affect the camera lens and shutter. If possible, purchase a new button and follow the steps in this LCD screen replacement guide to open up the camera and attempt the replacement process. Extra care has to be taken however since that position of this button can negatively impact the overall functioning of the camera as a whole. If you feel that the process might be too strenuous and therefore fear damaging your device, send the product back to its manufacturers as a last resort.