This help article is specifically for Android TV factory reset steps except model Q32B.
Click here for Q32B
From the "Home" screen, navigate to the settings icon on the top right corner and press ok on the remote.
Navigate down to "Device Preference and press ok on the remote.
Navigate down with the down arrow on the remote to "Reset".
Ensure that the "Reset" option is selected and click okay. The TV will now return to the factory settings which came out of the box, and it will restart automatically.