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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 400d service manual link: http://goo.gl/LHYVAy
it will help you to save a lot of money
Hope it helps, Thanks
To fix this err99 issue, 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.
If it appears again, then proceed to next steps
1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
If you still get the error you should send your product to canon for servicing.
What i find is that the larger the card the slower the write recovery in taking pictures. If you are an action photographer this is a pain as things happen fast . To have the camera take so long to recover from a write leaves you open to losing some excellent shots. So my rule of thumb is use smaller value cards. If you are just a happy shots photographer then this probably doesn't really matter.
To isolate the cause of the issue, 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 only 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 so, the camera may be faulty and requires a service. If it does not, then: - 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 faulty. Try a different card. If the message does not appear: - 1. Turn off the camera. 2. Clean the gold contacts on the lens by GENTLY rubbing them with a pencil eraser or soft cloth. Keeping the camera face pointing down, also clean the gold contacts on the camera, being 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 is faulty and should be serviced.
Hey mus326, According to the manufacturer a cf error code means there is a problem with your cf card, and error code 99 is a general error code which is often caused by using a lens other than a Canon lens. When formatting the cf card make sure you are formatting the card in the camera, and not using a computer to format the card. If you still can't get the camera to work I would suggest you have it looked at by an authorized service center. Sincerely, Allan Go Ahead. Use Us.