When I set the camera to capture RAW, it now freezes - i.e. the camera icons are grayed out. Initially, it will snap the RAW image, and once that is done, the icons gray out & the camera goes into video mode. But I cannot change any settings, or return to the camera to switch video mode off, or return to camera (still mode). I've checked plugs & all look fine; I've tried different memory cards to no avail; I've run calibrations; I've reset to default... Any suggestions? Thanks!