I'm struggling to work out what is going on. Photos "taken" using any of the manual settings on my Canon EOS 450D result in a delay (as though I have set the timer) and then no image is written to the card. I have it set to take photos in L/RAW and have previously used the same setup successfully (several years ago). I can take photos using the Full Auto setting but then I can't turn off the flash and my photos are getting overexposed (plus, don't want to use full auto!).
Any idea what could be wrong? Cheers