Bravo wrote:
I am having the exact same problem with my Canon XSI, and resetting to factory defaults didn't fix it. Has anyone else figured out how to solve this? I found the following:
-All the connections are good. The flash fires fine using the test button, and the hot shoe adapter works fine on a different model camera (Canon XT). The knob is neither too tight nor too loose. Live View is disabled.
-The flash DOES fire when the camera's pop-up internal flash is on. It even fires when the pop-up flash is on but covered (meaning that my B800 is firing via the PC connection and not the optical trigger).
It seems like the XSI disables the hot-shoe output unless the internal flash is switched on or a Canon speedlite is connected. I tried resetting everything to the factory defaults, I am using the latest firmware, and I can't find any settings that affect the problem.
I am considering upgrading to the CyberSync so that I can do away with the PC cord entirely, but I am worried that the same problem will occur since the hot shoe doesn't seem to be working right. Does anyone have any advice?
Some cameras tend to have different tolerances with their hotshoes from model to model. Try putting slight downward pressure on the adaptor to see if it fires then(please be careful not to break something or hurt yourself while doing this).