I bought my mom a Toshiba 4K smart TV for Christmas. She lives in Florida I live in Chicago. We got a friend to help her hang it on the wall and set it up. The screen keeps popping up asking her for a password. She does not have Internet at her home only cable TV through Comcast. This happens all day long and she is frustrated. She’s 80 years old but is ready to throw this TV out the window. How can we turn off Internet to this TV so that screen stop popping up. She has a turn the TV on and off many times per day. Please help