I was wondering about that. I knew the remote was IR because the bulb blinks when I see it through the computer's camera. (A little trick I learned when working at a TV/VCR repair shop.) It confused me because pointing it directly at the port sometimes does not work as well as pointing it at the screen. I have no idea why. I can even put the remote on top of the keyboard and it still work. The remote's penchant for not obeying the "line of sight" rule confused me.
Anyway, if you put a book in front of the IR port, the TV can't be turned on. Therefore, it works via the IR port. Too bad the remote isn't RF/bluetooth...