Having problems with your Canon Rebel XT / EOS 350D Digital Camera ?

Error 99 in EOS 400D

\015 I have a new Canon EOS 400D. While trying to use the built in flash it is giving me Error 99 stating to replace the battery. I have cleaned the lens contact and the Date-Time CR2016 battery also but did not work. Please advice.\015

Answers :

Here is a link which may help you.
http://forums.dpreview.com/forums/read.asp?forum=1031&message=9598105

It may be that the contacts on the lens is dirty, follow the directions, by using a clean pencil eraser (I would also suggest to use alcohol and clean the contacts after using the eraser). Also to remove the date button battery and the other batteries, then turn on the camera (with all batteries removed).
Then put the batteries back in.

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