3FG,
Thanks for the information. It worked. The reason I needed to get the Comcast remote OK button to talk to the TV was:

Dog ate Sony NSG-MR1 remote. (very expensive to replace)
I installed the free Sony Mobile Media app on my Android and Ipod touch devices.
The devices need to pair with the TV by bluetooth.
While pairing the devices to the TV, you need to press OK on the Comcast remote when the TV screen asks you to agree to the pairing.

This App is great. It has all of the functions of the remote.
Thanks again.