Novice raspbian user here. Just installed the unicorn hat on a pi3 with a fresh image of raspbian and I allowed the setup to force the audio to push to hdmi and even ran the audio setup script afterwards and set it to forced hdmi audio as well and still only get the first three rows to activate. Changed one of the demos to HAT instead of auto as well and get the same results. Ran the detect script and its being detected as a HAT and not a PHAT. Not sure whats going on any help would be awesome!
link to image of whats being displayed