Engadget
How to reset your Roku TV

A soft reset restarts the TV without deleting apps, accounts, or Wi-Fi settings by selecting Home → Settings → System → Power (or System → System restart) and confirming Restart, or by unplugging the unit for ten seconds if the interface freezes. A factory reset, accessed via Settings → System → Advanced system settings → Factory reset → Factory reset everything, erases all personal data, disconnects the Roku account, removes installed channels, and requires a complete setup—including Wi-Fi login, channel reinstall, and antenna scan—after the TV restarts.