Having problems with your Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens ?

My Canon Rebel XTi has repeatedly had the Err99 message pop up, and it's to the point that it happens, at minimum, every 4-5 shots I take. I've tried cleaning the camera and lens contacts multiple times, but the problem has gotten increasingly worse and refuses to be fixed. I have a 17-85mm Canon zoom lens and I'm not sure what I should do at this point.


Answers :

There are several issues which may have caused this, one is the CF another are the lenses. I found the solution months ago from this site.

To isolate the cause of the issue, I suggest that you do the following:
1. Turn off the camera.
2. Remove the lens, battery, and CF card.
3. Allow the camera to sit without power for approximately 20 minutes.
4. Insert a fully charged battery, and turn on the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99′ message appear? If it does, then the camera should be
serviced. If it does not, then please proceed to the next set of steps:
1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99′ message appear? If so, then the CF card is the most
likely source of the issue. Try using a different card.
If the message does not appear, please complete the following steps:
1. Turn off the camera.
2. Clean the lens contacts by gently rubbing them with a pencil eraser
or soft cloth. Be careful that you do not let any debris fall into the
camera body.
3. Reattach your lens.
4. Turn on the camera.
5. Depress the shutter button as you would to take a picture.

If the “ERR 99′ message only appears when one particular lens is
attached, then that lens should be examined by a service technician.
If you see the “ERR 99′ with a different Canon lens attached, then the
camera should be serviced.

Repair Help & Product Troubleshooting for Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens

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