I have a 5 year old ROKU tv that has the old operating system, thus no access to Apple TV+, like the new models. Can I buy a Roku Express 4K+ and bypass the built in operating system? If so, how? My TV is an older Insignia model. I don't want to watch online, I need the big screen
You just set the TV to display the input where the Roku is connected, same as a Blu-ray player etc.
What Roku operating system version do you have? SETTINGS > SYSTEM > ABOUT will show you. While there, what model Roku TV do you have?
Have you tried to update your Roku software via USB thumb drive? https://support.roku.com/en-ca/article/212361468