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You will need to go into your
account, online. Log in there.
Then, connect your Harmony remote to your computer.
Then, go into the setup of your remote, and remove the Sony TV.
Then go into the setup of your remote again, and add the LG TV model. (
Note: it may be best to remove the SONY TV after you add the LG TV in, in some situations where data associated with the old TV, will need to be (or be convenient if it still is) available for the new TV also.)
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