I just ran the firmware update (4.0) on my em1 as well as for my 12-40 pro lens and now I am getting a blank screen and no option to fire the shutter although all menu buttons work. I put on a different lens and everything was normal, went back to pro lens and same thing. removed the battery and still the same thing. I am REALLY hoping this is an easy fix as I leave for mexico in three days. anybody have any recommendations?