Originally posted by T Shaw Ok, I only have a couple Yongnuo and Godox speedlights to try. They didn't fire either, but I'm not sure they're compatible. I figure the YN 560iv would because it's a universal, but maybe not.
If the Yongnuo and Godox units don't fire in manual mode, it's almost certainly the camera.
That big pin in the middle should nearly always fire the flash...
Usually compatibility is a matter of the camera and flash communicating settings and TTL commands.
Just the command to fire, though, is typically very simple...
Unless there is a physical issue (like a Sony flash on a not-Sony camera), just about everything will fire, even if the exposure is wacky... so I think your camera is broken.
-Eric