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Where would I find the connector for the camera to check for corrosion?

I don't know if my camera not working is related however now while I am driving my main menu screen switches from the main menu to my radio sound settings. I have tried putting it on random screens to see if there is any connection and there is not. Doesn't matter which screen I am on. It also makes the tone as if I had actually pushed the on screen button to switch to the sound settings. I read on another site that the camera issue might be linked to the same module.  

2011 Ford Edge, my menu switches to settings then sound on its own. I have researched how to access the "hidden" diagnostic screem however cannot get it to come up. I did a hard reset as well. My back up camera quit working aprox a year after I bought it. Unfortinately could not afford the warranty.  I read about the 2013 update. How can I tell if my APM just needs an update or replaced?

I have a 2011 Edge and my camera has done the same thing. Hasn't worked for about 2 years.

The main screen changes to settings sound on it's own. It makes the on screen beep as if someone is pushing the button and automatically switches. I have done a factory reset, cleaned the touch screen as well as the sound button down below. Nothing is working.