3000 or so shutters in.... I mounted a O75/1.8 that just came back from warranty cleaning... Camera turns on, shows a full image on LCD or EVF...nthrn shuts down after 3 seconds. Not responsive to any buttons at all. Does the same thing with lens off. When I turn it on I can hear a thud and see a little component try to slide over the sensor...not sure if its the shutter curtain or the stabilization locking the sensor in place. Only change to camera was upgrading to recent firmware. Immediately after that I took a few test shots and it was okay. Pulled battery already. Is there a way to reboot the camera?