internal battery or not
My camera lose its settings when i switch it on and off. does the camera have an internal battery that keeps the memory?
Check that the All Reset setting is set to OFF.
Here is an image that shows how to get to the setting. Click on the image to enlarge it for better viewing.
Here is a link to the camera's user guide. Scroll to p.136 to see what settings are affected by the All Reset setting.
Your camera does not have an internal battery to maintain the settings if the battery is removed. There is a non user replaceable capacitor mounted on the systemboard, which is kept charged by the battery and it will maintain the settings if the battery is removed for charging, but it only has enough charge to do this for approximately 24 hours. (It will be less then 24 hours if the battery has not been in long enough to fully charge it and then the battery is removed for whatever reason). After this time if a charged battery is not re-inserted back into the camera, the settings will revert back to their default state.
Hopefully this is of some help.