I came to use my OMD EM5 today and it wouldn't turn on. I switched lenses from my Olympus 25mm f/1.8 to the Panasonic 14mm f/2.5 and then I was able to turn it on. Since then it doesn't seem to matter what I do, I can't get the camera to turn on. I have put a fully charged battery in and still doesn't turn on... any suggestions? Is there any way to hard reset it or something like that?