# Unicorn HAT + Raspberry PI 3 Not lighting at all

**URL:** <https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447>\
**Category:** Support\
**Created:** [March 31, 2018, 2:26am UTC](https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447 "2018-03-31T02:26:56Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![fatima](https://avatars.discourse-cdn.com/v4/letter/f/f17d59/32.png) [@fatima](https://forums.pimoroni.com/u/fatima)\
**Post date:** [March 31, 2018, 2:26am UTC](https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447/1 "2018-03-31T02:26:56Z")

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Hello All, I just got my new unicorn hat. I am using Raspberry PI 3. The script examples are running but the unicorn HAT is not lighting at all!! I disabled the audio analog. (typed aplay -l and got no soundcards found…).  
Any ideas?

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**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\
**Post date:** [March 31, 2018, 11:11am UTC](https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447/2 "2018-03-31T11:11:37Z")

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Unicorn HAT or Unicorn HAT HD? (they use different libraries, just to be confusing!)

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**Author:** ![fatima](https://avatars.discourse-cdn.com/v4/letter/f/f17d59/32.png) [@fatima](https://forums.pimoroni.com/u/fatima)\
**Post date:** [April 1, 2018, 8:11am UTC](https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447/3 "2018-04-01T08:11:59Z")

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It is Unicorn HAT HD

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**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\
**Post date:** [April 1, 2018, 8:12am UTC](https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447/4 "2018-04-01T08:12:46Z")

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Which one-line installer did you use? You have to use the HD one, since the “unicornhat” software is not compatible with HD:

```auto
curl get.pimoroni.com/unicornhathd | bash

```

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**Author:** ![fatima](https://avatars.discourse-cdn.com/v4/letter/f/f17d59/32.png) [@fatima](https://forums.pimoroni.com/u/fatima)\
**Post date:** [April 1, 2018, 10:50pm UTC](https://forums.pimoroni.com/t/unicorn-hat-raspberry-pi-3-not-lighting-at-all/7447/5 "2018-04-01T22:50:57Z")

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Thank you so much!! This works! I never noticed that there is a difference in the libraries. This is confusing.