Hotshoe has stopped working?

[Earthdarling]

I have been using my 6D with Excalibur flash unit for months, and suddenly it has stopped working with my camera. I can't figure out what is wrong. The flash is firing if I press the test button on the flash cord, but it's no longer speaking to my camera, so doesn't fire when I press the shutter. I wouldn't be surprised at all if it's something strange I've done with my settings, although I haven't touched them much lately. I feel like i must have done something! The camera otherwise is working fine. Can anyone shed light on this (pun intended)? I am new to using flash at all, so please bear with me!

 

[Loswr]

Can you borrow another flash to test? Are you shooting through the viewfinder, or using Live View?

 

[Don Haines]

Can you borrow another flash to test? Are you shooting through the viewfinder, or using Live View?

Also, does the flash work on another camera?

Have you tried a fresh set of batteries? I have seen some very weird behaviour out of electronics when voltages get low....

As to settings, one thing to try when unexplained things happen is to "reset to factory settings".

 

[Wick]

I have been using my 6D with Excalibur flash unit for months, and suddenly it has stopped working with my camera. I can't figure out what is wrong. The flash is firing if I press the test button on the flash cord, but it's no longer speaking to my camera, so doesn't fire when I press the shutter. I wouldn't be surprised at all if it's something strange I've done with my settings, although I haven't touched them much lately. I feel like i must have done something! The camera otherwise is working fine. Can anyone shed light on this (pun intended)? I am new to using flash at all, so please bear with me!

I had a similar problem. Pull the battery out of your camera. Wait a few seconds and reinsert. Worked for me.

 

[Gert Arijs]

Clean the hotshoe and the flashshoe. I've had problems with dirt. It was barely visible, but a simple cleaning solved the issue.
Good luck!