I had been using the Olympus share app or whatever its called and turned the camera off from the app. Then I turned the actual power switch to off. Later when I went to turn the camera back on it did not. Pulled the battery and replaced then turned it back on. It did fire up after pulling the battery but concerned me a little that something might be afoot. Anybody else experience this? Hopefully only something to do with powering down via the app and not a larger issue.