Think we need a little more information on your current issue and what you are trying to do. Give an example what you remember.
Going from that you have "pairing" in the label of your posting, I am assuming you have a laptop/computer and a RokuTV. If you are trying to control your RokuTV from a website, there was/is a website app called Remoku that gives you basic control over the RokuTV as long as you know the RokuTV's IP address. You can then use the on-screen remote or your arrow keys on the keyboard to navigate. http://remoku.tv/ Remoku is not an official Roku product/application though.
Otherwise, you can get online content to stream on your RokuTV by attempting to either cast from your laptop or use an HDMI cable from the laptop to the RokuTV. You will likely have to switch to the appropriate HDMI input though so will need some type of remote control navigation (like using Remoku above).
You may just want to run to Walmart, Best Buy, Target and pick up a Roku Voice Remote and pair it to your RokuTV to make your life easier. (or purchase a universal streaming remote compatible with RokuTV).
If you are actually trying to setup/activate the RokuTV, you will need a physical Roku remote anyway.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102