Problems with my 7D

[fishing4sanity]

If my camera is set in Auto or CA or any of the 3 camera user settings (C1 to C3) the shutter release works normal and a photo is taken. If I have it in Aperture Priority (perhaps my most used mode), Shutter Priority, Manual or Program modes the camera locks its exposure and focus as normal, but when I depress the shutter release the rest of the way it sounds like the shutter actuates, but the view finder goes black and no picture is taken. The viewfinder remains blacked-out and then if I touch the shutter release again it takes a picture wherever the camera is then pointed. I used the camera a couple of days ago without any issues. I'm not sure if i accidentally changed a setting or if I have a real problem with the camera. I hope this is just a "DOH" moment on my part. Any help would be appreciated.

 

[Flare]

Check your mirror lockup function.

 

[fishing4sanity]

So it was just another "DOH" moment on my part. Strange thing is I don't know how that got changed in the first place. Thanks!