I have a D750 that was purchased new about 2 yrs ago. My backpack was stolen which had my charger in it, in return the camera was completely dead for about a week. I bought a new charger, charged the batteries for the camera and external grip. When I put the fully charged batteries in and powered the camera on, the viewfinder display had no information. No metering, no ISO, no shutter speed, no nothing. Also I noticed that my rear LCD display was stuck on "Clock Has Been Reset." When attempting to reset the clock I wasn't able to move the arrows to change time and date. Not even the joystick or arrow keys on the camera are allowing me to move the highlighted areas to change date and time, it's completely stuck on that screen. I hope I've made the problem clear, if not I'm happy to help further with more info. I've also added two images that highlight the viewfinder and LCD screen. Thank you in advance for your time and help.