Turn on the TV
Insert fresh batteries into the Comcast remote
Press and hold the Setup button until the LED turns green or blinks
Press the TV button
Enter the TV brand code using the number buttons
Press Power to test the TV
If the TV turns off, press Setup to lock in the code
If the TV does not turn off, repeat with another code for your TV brand
Use the Comcast remote to control volume and power
If needed, use the Comcast remote code lookup or auto-search method for your TV model