HELP, 1D MK4 shut down today
I was out birding today and after a few dozen shots, the camera shut down after I pressed the shutter. The mirror locked up and the camera just turned itself off. I turned it off using the switch, took out the battery, put it back in. It just doesn't turn on. No menu, no LCD, no functions. It just stuck with the mirror up and can not be powered up.
Any suggestions what to do, before I take it to the service??