Steve: I have been able to "fix" several flash cards in this state very simply. It seems the cards become inaccessible to the original camera when loading or display is stopped by battery failure or user shutdown during writing or reading the card. I put the card in another brand or different version of a manufacturer's camera and format it. Then it will work in the original camera after reformatting there as well. If the pictures are important, there are recovery programs which work with external card readers connected to a computer. Avery [Non-text portions of this message have been removed]
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OT Steve's fried flash card recovery
2004-01-09 by Avery Minor