https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/512008#M5380 <P>What camera are you using it on first of all. This has an impact on it too.</P> Tue, 12 Nov 2024 12:34:28 GMT deebatman316 2024-11-12T12:34:28Z https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/511983#M5379 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="20241112_092456.jpg" style="width: 4000px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/60743i7D1112F92CD0F0E0/image-size/medium?v=v2&amp;px=400" role="button" title="20241112_092456.jpg" alt="20241112_092456.jpg" /></span></P><P> my Canon 580EXII won't fire, could this be the problem?</P> Tue, 12 Nov 2024 13:12:57 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/511983#M5379 Hana 2024-11-12T13:12:57Z https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/512008#M5380 <P>What camera are you using it on first of all. This has an impact on it too.</P> Tue, 12 Nov 2024 12:34:28 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/512008#M5380 deebatman316 2024-11-12T12:34:28Z https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/512009#M5381 <P>There is definitely some corrosion from the batteries but I have seen far worse.&nbsp; How is the other end of the battery compartment?</P> <P>If the test fire button on the back of the flash works, then the batteries/battery contacts are NOT the issue.</P> <P>Rodger</P> Tue, 12 Nov 2024 12:39:05 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-580EX-II-not-firing/m-p/512009#M5381 wq9nsc 2024-11-12T12:39:05Z