Here's how to do a power scan for TV codes on a 322 remote. With the TV on, press and hold the "TV" mode button on the remote until all the mode buttons lite up. Then press the small "TV Power" button. The "TV" mode button should be solid red then. Next keep pressing the up key on the remote with about a seconds gap between each depression until the TV turns off. Then press the # key. This will lock the code into the remote and you're all set. You may have to press the up key litterally a couple hundred times to get it, but that's the easiest way. I think Zenith codes are somewhere towards the beginning anyways.