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1.Remove the battery, lens and CF card. Allow the camera to sit without power for 20 minutes and then reinsert a fully charged battery.
2.Turn the camera on and push the shutter button as if you were taking a picture.
3. If you don't get the error message reattach the lens and insert the CF card.
4. Check the below canon eos 20d service manual link: http://goo.gl/YtVLQR
it will help you to save a lot of money
Hope it helps, Thanks
There is no function to do this on the EOS 400D. Don't forget the camera is an SLR and still has to open and close a shutter to take a picture. The image is then converted using a CCD instead of exposed on film. I find with my 20D I just take loads of pictures and review them and then delete the ones that I don't want. This is the beauty of the digital age.
Hello - I figured it out. I had the exact same problem. The shutter failed and it had to be fixed by Canon. Apparently that happens after the shutter fires so many times (like a click-count on a printer). I just got my camera back and it's doing awesome now.
The autofocus mechanism on some lenses can be damaged if you manually focus while the camera is attempting to autofocus. Basically, you would be working against the motor and gears.
There is no need to download software before using the camera, however, I would suggest going to Canon's website and downloading the firmware upgrades for it. Here's the link:
Canon 20D Firmware Download
Hope this helps!
Prior to models made in 2007 or later, no SLR camera (film or digital) was able to let you compose the picture before shooting it other than through the optical viewfinder. SLRs are different in this respect from compact digital cameras. You will only be able to review your pictures on the LCD after they are taken.