Question about Canon EOS 400D / Rebel XTi Digital Camera
I love my camera and it has served me well for over 3 years but a couple weeks ago it started failing to capture the image and flashing ?Err 99? on the display! The only way to get rid of the message was to turn the camera off. Or reinstall the batteries. I tried to ignore it but now it happens very often! I'll appreciate any help on this. Thank You! Jhon I have just started experiencing the Err 99 message on my canon 400D. I've only had the camera a couple of months but have taken it on holiday backpacking. The lens is a tamron 28-200mm which I have had for about 6 years (from my old 35mm camera) and has done a lot of travelling. Out of the blue it started displayning the Err 99 symbol and made a grinding noise when I turn it on. It doesn't happen when I change lenses. Is there a way to try and fix this or do I need to take the lens in for a service (which seems to be as expensive as buying a new lens)!!!
A common cause of Err 99 on the Digital Rebels that have some age on them is shutter failure. There is a switch called CN2 in the shutter that fractures and causes either bad flash sync or shutter failure-or both. The repair is to replace the shutter. Sometimes the CN2 switch can be repaired but we find at our shop it's better to replace the shutter with a new one. That way, with a new shutter, you will get years more of good service from the camera.
There are other causes for Err 99. Check the electrical contacts on the rear mount of the lens and the coresponding contacts in the lower portion of the mirror box in the camera body. Make sure they are clean and not distorted or bent.
There are more but these two are, by far, the most common.
Posted on Dec 04, 2007
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