Originally posted by d150 it would turn on after a little (gentle) shaking or tapping. This wasn't a huge issue.
That would be (to me) a huge issue. Any high tech equipment shouldn't require any tapping or shaking to turn on. There us definitely an intermittent contact somewhere. The camera could be turning on/off during a shot because the vibration from the mirror slap is strong enough to affect the intermittent connection.
Originally posted by d150 Today, when I tried to take a picture, I felt a strange movement inside the camera when the shutter closed. The best I can describe it is like a piece shifting or tiny gyroscope turning-- nothing jerky, just a subtle motion that had never been there before.
This may be the in body SR you're noticing, I'm guessing.
Originally posted by d150 From the little I know about the inner workings of cameras, I'd say it seems to be a loose part that is moved(?) pushed aside(?) by the closing shutter or some related part.
The main thing I'm looking for (maybe it's too much to ask) would be someone with enough knowledge to tell me how to fix this problem on my own, with no specific tools or expertise.
I wouldn't even try as you may end up aggravating a simple problem.
First I would check is the battery door. Perhaps the pins have gotten bent somehow and are having intermittent contact with the batteries. I would check the inner pins as well.
Cheers!