Thanks David.. in the meantime Canon Support have been great in coming back so quickly and their suggested fix has brought it back again. Sharing the detail below in case anyone else has the same problem. (I had actually tried the reset but not the other actions):
- Put the camera on ‘P’ mode then press menu and go in to ‘SPANNER’ menu tab 5, reset camera and select basic settings then clear all camera settings.
- Now press the menu and go into orange camera menu next to spanner menu and select tab 3 and select 5th option ‘clear customized settings’ and this will clear all customize buttons and customize dials settings.
- Now press menu and go into orange camera menu next to spanner menu and select tab 5 and select ‘clear all custom functions settings C.Fn.’, this will clear all custom functions settings, now turn the camera OFF and ON again try AF and check.
Regards
Mike