Canon 580EXII no comms with 5DMKII

Canon 580EXII no comms with 5DMKII

8 posts
6 Nov 2014
darrinhenry
Photographer
darrinhenry
A child recently knocked into my camera, Canon 5DMKII, recently while out on a shoot. I had the external flash on at the time. Since then the camera seems to have problems communicating with the flash unit, ie, not triggering the flash when attached. Every now and again, when I connect it up to try, it will fire just the once, and then no more.
I've tested the speedlight on another body (40D) and it works fine.

I've also tried another Canon speedlight on the 5DMKII, a 430EX and this has the same problem of not seeming to be able to communicate.


The Yongnuo speedlights which I also use, these continue to operate fine, nothing different.

It appears to be a problem with the 5DMKII body having problems communicating with genuine Canon flash speedlights.
Has anyone else experienced this and any suggestions? A simple quick fix seems a long shot, but you never know... might as well ask

cheers
Posted 6 Nov 2014
RedChecker
Photographer
RedChecker
Probably won't help but I'd give the flash contacts (camera and flash) a clean with a soft pencil rubber just in case it's a contact issue.

Posted 6 Nov 2014
darrinhenry
Photographer
darrinhenry
Thanks - I should have mentioned I've already tried giving all the contacts a good clean. Didn't make any difference.

Posted 6 Nov 2014
RedChecker
Photographer
RedChecker
Is the Yongnuo a 'dumb' flashgun (ie. single pin) or does it have TTL data pins?

If the former then one or more of the data contacts on the camera are probably damaged.

Posted 6 Nov 2014
riddell
Photographer
riddell

It sounds like the camera is damaged one way or another.

Posted 6 Nov 2014
darrinhenry
Photographer
darrinhenry
RedChecker

Is the Yongnuo a 'dumb' flashgun (ie. single pin) or does it have TTL data pins? If the former then one or more of the data contacts on the camera are probably damaged.


Yes, it's 'dumb' as you put it, single pin. Sadly I think it's a camera fault also. Everything else though works fine. Real pain as I wanted to use the 2nd curtain facility for a shoot.
Posted 6 Nov 2014
MCPhotos
Photographer
MCPhotos
I had exactly the same issue with the same combination of kit last year - On mine I was working and the tripod gave way and the head rotated causing the camera to drop against one of the legs and The flash took the force of the blow it was a problem with the additional TTL pins and had to send the body for a professional repair - not good news re q quick fix !

Posted 8 Nov 2014
darrinhenry
Photographer
darrinhenry
MCPhotos

I had exactly the same issue with the same combination of kit last year - On mine I was working and the tripod gave way and the head rotated causing the camera to drop against one of the legs and The flash took the force of the blow it was a problem with the additional TTL pins and had to send the body for a professional repair - not good news re q quick fix !


Yeah, it was a long shot hoping for a simple fix, but sometimes you can be lucky. Not this time unfortunately. I'm back in UK in March next year for a bit, will have to see about taking it for repairs then. Planning to upgrade to the MKIII anyway, so depending on possible repair costs otherwise this one will be fine as a second cam.
Posted 11 Nov 2014
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