EOS 850D: Auto focus with shutter issue, back button focusing

[BENCAR]

The Auto Focus in my EOS 850 D only works now if I use the button on the back of the Body, not by depressing the Shutter Button.

[BENCAR]

Simple test, took Lens off T5 Rebel, put it on EOS850D, no Auto Focus, didn't touch any settings. Take Lens from EOS850D, put it on T5 Auto Focus works perfectly. Swapped lenes back to original Cameras, T5 works fine, EOS850D no Auto Focus when depressing Shutter Button part way down. Again, same Shutter Button part way down, no matter which Lens is on it. Both Auto Focus perfectly on the T5.

[Waddizzle]

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@BENCAR wrote:

Simple test, took Lens off T5 Rebel, put it on EOS850D, no Auto Focus, didn't touch any settings. Take Lens from EOS850D, put it on T5 Auto Focus works perfectly. Swapped lenes back to original Cameras, T5 works fine, EOS850D no Auto Focus when depressing Shutter Button part way down. Again, same Shutter Button part way down, no matter which Lens is on it. Both Auto Focus perfectly on the T5.

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We understand that.  If you purchased a used camera, then you want to reset the camera settings back to a known state.  Sometimes a camer reset needs to performed when the camera is generally misbehaving.

I have described a quick procedure to reset the buttons and dials on your camera.  Try it.