Hi all, I guess this is sort of my introductory post all in one.
I recently acquired a used 400D with a Canon 75-300mm lens. It takes great pictures as far as I can tell - you can probably judge better from the samples. However I am having one problem....
When I went to test it out before buying, the shutter button didn't click as I expected. The shutter button is of course supposed to be 2 stage with autofocus (soft) then shutter release (with a click). When pressing the button I could feel the soft motion but no matter how much pressure was applied, it would not do the 2nd stage 'hard' click for the actual shutter release. The camera would still autofocus on the first soft click but would then capture the photo as soon as the autofocus was complete (all on the soft click). In case that is confusing to understand. The button was acting like a smartphone camera where it would focus and capture all at once from just the soft click.
I figured the button was just worn and I could get by with it as a first dslr anyway. I don't see myself needing to lock focus and move the camera from the subject very often and if I do I could just use manual focus or the "back button focus". So I went ahead and bought it!
After a couple weeks now it seems sometimes I can get the button to work as it should (two stage) and other times it'll click like a two stage button but not actually capture images on the 2nd click. Then other times it'll go back to just soft button focus+capture. Sometimes it'll need a good press to actually capture an image and sometimes I can't even get it to capture without fiddling with the button and moving it about. I've done some researching and seen some people replacing the button and others pouring alcohol through the battery compartment.......
So what do you guys think I should do? I really like the camera so I am definitely going to get it working as it should. Does this problem sound like a bit of dirt under the button? Or is it most likely the button/contacts wearing out and in need of replacement? If it needs replacement does anyone have some tips? I'm pretty mechanically inclined (disassembled AND re-assembled all sorts from phones to cars) and I've had a browse at the 400D tutorials on ifixit which seem alright.
Any input or suggestions are greatly appreciated!