Q: Appletv is not allowing itunes password to be entered to view purchases.

Hi asoregon,

I know you have said you have restarted your Apple TV but have you tried a restore? If you do a restore, it will remove any inconsistent behavior when trying to access your purchased content 

Apple TV (2nd and 3rd generation): Restoring your Apple TV

https://support.apple.com/en-us/HT202118

Take it easy,

-Norm G.