I need help! My D5100 stopped firing the on-camera flash unit (SB 700) that I've got. I used to just be able to mount it on and start shooting.
I changed the batteries recently and don't know why it's not firing. When I press the red button on the flash, it fires. When I point and focus the camera on my subject the flash seems to be doing nothing!
How can I get my D5100 to start talking to the SB700 again?
I'm lost and any help would be much appreciated.