Canon Speedlite 550EX TTL Flash Logo

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Debbie Taylor Posted on Apr 21, 2007
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Speedlite 550EX Speedlite Flash

My flash has been working great until the last couple of days and guess what, I'm on may way to shoot some wedding photos. When I put new batteries in and turn the flash on it immediately turns from the green ready mode to red. I'm unable to use the flash. I called Canon tech support and they recommended that I clean contacts with a clean eraser. I tried that and it didn't work. Do you have any ideas? Thanks for your help. dtaylor

  • Slimhim Nov 25, 2007

    I am having the same exact issue. I don't know about yours but mine wont flash at all, not even when I push the test button. Any suggestions out there?

  • sumthinsweet Oct 06, 2008

    Hi there,


    Was there a resolution to this problem?  I am having the same problem w/ my 550EX.  Haven't used the flash in a couple weeks now and used new clean batteries...and I still can't get a flash out of it.  The red light will come on, but I can't even get a test flash.


    Please help!


    Cheers,
    Helene

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  • Posted on Dec 21, 2007
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Let the flash rest for two weeks, to discharge the cap.
Buy Energizer Lit. Batteries.
Do not touch batteries ends with fingers.
Cleans 4 batteries with an Ink Eraser.

Alexander
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