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I have a canon 70D and a yongnuo speedlight YN568EX II. When I first unboxed it from new I was able to just slip on the hotshoe of my camera and fire away. For some reason, it stopped firing.The flash behaves likes normal, communicates with the camera and everything, but does not fire. I've tried tons of setting to get it firing but hasn't been successful.

Any thoughts?

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    \$\begingroup\$ Does the flash fire when you press the "Pilot" button? \$\endgroup\$
    – JenSCDC
    Jun 7, 2015 at 15:35
  • \$\begingroup\$ Have you try with fresh batteries? \$\endgroup\$
    – Romeo Ninov
    Jun 7, 2015 at 15:45
  • \$\begingroup\$ Hi Andy and Romeo, the flash doesn't fire when I hit the Pilot button but all communication between camera and flash works fine. I put new batteries on but still no luck. I haven't used the flash for more than a day and that was when I was going through the functions... \$\endgroup\$
    – Marcio
    Jun 7, 2015 at 15:57
  • \$\begingroup\$ Is the flash connected to the camera when you use the pilot button? Also, are you using the camera in Liveview mode, as I believe that Liveview silent shooting modes in the camera disable the flash functionality \$\endgroup\$
    – laurencemadill
    Jun 8, 2015 at 10:43
  • \$\begingroup\$ I have the same problem. The pilot button works but when I shoot a image with the flash turned on and red light on it doesn't fire. \$\endgroup\$
    – Felix Damian
    Dec 16, 2016 at 18:05

3 Answers 3

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Sounds like you got a bad unit. I'd say return/exchange it. If it's not firing from the Pilot button when full charged with known good batteries, then it could be an issue with the capacitor or the flash tube, and that's pretty major.

Yongnuo gear has a lot of happy customers, but if you go back through the history of their stuff, you'll find that copy consistency and component quality has been an issue with them in the past--the low price has to come from somewhere. DOA units that would fire once or twice and then blow their capacitors were not uncommon back in the early days of the YN-565EX (just google "YN-565EX capacitor failure"). While YN's QA has gotten much better over time, they're still not at the level of OEM reliability.

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It just may be your camera settings. I was having this problem, it would not flash when triggered by my camera but when I pushed the pilot button it did. I had tried changing batteries before this but with brand new batteries it still was not working. I really didn't think there was anything wrong with the flash. I changed my shutter speed and "boom"- it worked!

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    \$\begingroup\$ The OP sais in the comment that the flash doesn't fire when he hit the Pilot button. \$\endgroup\$
    – Olivier
    Nov 15, 2016 at 19:03
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There are settings inside the camera. where you can fire the AF assist beam, without firing the flash, so that it enables the camera to focus better in dark situations. AF ASSIST BEAM AND FLASH FIRING

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  • \$\begingroup\$ Could you elaborate a little ? You are redirecting to another website for the answer, which might not be helpful if this website goes down and the page removed. \$\endgroup\$
    – Olivier
    Apr 23, 2016 at 17:46

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