Remote not powering tv off

You could try unpairing it from the TV and make sure that the TV has HDMI CEC off, and that you have clear line of sight from remote to TV.

Here are some steps if you'd like to try this method:

If you would no longer like your TELUS Remote to control your TV’s volume and power, you can unpair your remote.

• Press and hold the Input and Back buttons for 3 seconds until the LED on your TELUS remote lights up solid green
• Press OK and wait for the LED to flash green twice (the remote has now been unpaired from your TV)

The TELUS Remote will now control only the TELUS TV Digital Box, and not your TV’s volume and power.

At any point, you can choose to control your TV using your TELUS Remote again. From the Home screen, navigate to Settings → Device settings → Remotes & Accessories → Program Remote with TV and follow the steps on screen.