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Canon 7D Error 40

Rye

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Mar 24, 2008
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Today I went to turn on my 7D and got a blank LCD. Reached in my bag for a fresh battery, popped it in, got an "Error 40". I tried two other charged batteries and got the same result. Took off and re-mounted the lens, took out and put back in the CF card, turned the camera back on and it worked fine after that. I'm also finding that if I leave a dead battery or a battery that's low on charge in it then put in a fresh battery the camera forces me to reset the date and time as soon as I turn it back on.

Anyone else have this experience? I was thinking maybe a weak or dead internal battery?
 

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