Screen issue

[JayJ]

Yes that is possible, if you want to disable it go to...

Menu> Settings> Backup & reset...

Untick the options there...

[S.Prime]

I have never experienced Google retaining any WiFi keys. You can verify that Google has not retained your key, by going to Settings > WiFi > Tap on your connected network > Tap "Forget"
Then try to connect to your network again and if you are prompted for a key, Google or your device has not retained it.

[JayJ]

It usually works in a different way, for example I wipe my device either from flashing the factory image or a custom ROM and when I first connect I have to enter the key phrase for the router I am connecting to but after this initial connection any other Wi-Fi routers I have used are automatically added to my device.
Any serial flashaholic will know this and the same usually happens with applications too, so long as the settings I mentioned above are ticked.

[bjs229]

I am surprised that the Wep /WPA key was remembered from one machine to the next. Learn more about the device everyday! Anyway, Congrats on your new one and good luck with the hardware!

[JayJ]

Yeah despite knowing Google did this I wasn't aware of it working from one device to another, okay so I haven't had a replacement Nexus 7 but when I got my N7 it didn't know my router access key phrases from my S2 nor did my S2 from my previous Android device...