Question about Canon Speedlite 550EX TTL Flash

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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

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Re: speedlite 550EX Speedlite Flash

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.


Posted on Dec 21, 2007

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