I have had Roku on my 2 tvs in additional rooms for years. Starting yesterday, I am in guestmode and can not figure out how to turn it off. My code no longer works. I stream xfinity on there from the main tv in the living room. Randomly, the tv will turn off and I have to reload everything. Do I need to update my control box and remote? Please help, this is really getting annoying.
You might go to settings->system->about and make sure the email address shown there is the one you are logging in with a roku.com. (Otherwise it could be using a PIN from a different account.)
Go to Settings > System > About on the Roku in question and note the mail address associated with the Roku account to which this Roku is linked.
Log into that Roku account at https://my.roku.com using that email address as your login name.
Scroll down to the My linked devices section where you will see a list of all Rokus linked to that Roku account. You can enable or disable Guest mode there for each of the listed devices.