How do you repair canon camera lens error restart?

Would not recommend opening the camera as the chances are much greater for you causing greater damage. BUT would instead recommend that you try the seven sequential repair step outlined for a lens error in the below listed Related Link "Fixing a Lens Error on a Digital Camera". None of the steps outlined in this link involve opening the camera. and reportedly you should have close to a 50% chance of success with these techniques.

If you cannot repair the lens yourself with the first related link, then consider trying the two 'Digital camera repair" links below for two online digital camera repair businesses.