I have the EOS 400d - also known as EOS Digital Rebel XTi, or Kiss Digital X in Japan - and as of tonight, it stopped working. It won't do anything, with or without batteries or a CF card, except flash a blue light in the top left when batteries are inside. I've tried taking both batteries out, the CF card out, letting the capacitors drain (someone suggested) but it still won't work. I know the power works because that blue light keeps flashing. It won't be read by the computer through a direct connection, and I don't have a CF card reader. I looked inside and it seems like a pin is missing. CF card seems to bear the scars too. I've never looked too closely at the CF card before, so I don't know if the pin was missing before. I have a feeling that's the cause, though.