lol you should have chose 3 for 720p. 0 only works if in ps3 video mode to test out with video modes work on your TV and ps3 video mode works when you have YDL installed and it is in text mode. I don't remember telling you to use 0. You need to reinstall and use the 720p . At the kboot tab through and search for ps3_install_720p instead of installing in text mode. If you do that, you won't need to change the yaboot.conf. It does that for you.
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