I’m new to photography, but on the back of the 5DC, there’s a large wheel to rotate through your options as well as adjust your aperture. I tried to adjust, but nothing happened. I noticed this happen before, but I figured it was me who got confused. The wheel works fine for everything else. I’m not sure if I need to service it or adjust a setting or what. Please help. EDIT: I did the classic, shut off, blow on battery method and it worked. But I still wonder how big of an issue this could come to be in the future.
" I did the classic, shut off, blow on battery method and it worked."
That may have looked like it worked but it didn't fix it. It was a coincidence. Very first thing it to rest the 5D. Remove both batteries and if the keep alive battery is the original replace it. Leave them out for 30 minutes or so. When you press menu does the big wheel work? If it does it works and you had something else wrong.
I doubt Canon service the 5D any longer.