After using a new Canon 580 Speedlite I can't get the camera flash unit to open, no matter which photo mode I use.
When I check the camera menu settings for camera flash adjustment, it says that the external flash unit is still in place, which it isn't; and checking the menu adjustments for an external flash unit, it says not detected, which is correct.
At the moment I'm baffled, which admittedly isn't hard to do.
I've tried everything that I can think of and even recharged the camera battery. So any suggestions?