# Problem with Pico Unicorn Pack

**URL:** <https://forums.pimoroni.com/t/problem-with-pico-unicorn-pack/18797>\
**Category:** Support\
**Created:** [February 4, 2022, 11:12pm UTC](https://forums.pimoroni.com/t/problem-with-pico-unicorn-pack/18797 "2022-02-04T23:12:45Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jonas](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonas](https://forums.pimoroni.com/u/Jonas)\
**Post date:** [February 4, 2022, 11:12pm UTC](https://forums.pimoroni.com/t/problem-with-pico-unicorn-pack/18797/1 "2022-02-04T23:12:45Z")

</div>

I got my headered Pico and Unicorn Pack in the mail today.  
Eager to try it out I learned how to build the C/C++ examples from Raspberry Pi and blink worked like a charme.  
So I moved on to the unicorn pack and set up the pimoroni-pico sdk. I went ahead and build the unicorn example. I moved the uf2 file to my pico with the unicorn pack connected. It disconnected but nothing happend. The LEDs did not light up.

So I figured, that I made a mistake of some kind. So I went ahead and installed the custom micropython from pimoroni. Working with thonny I tried to run the demo.py script. But the LEDs didn’t light up either. :(  
Strangely enough the test of the button worked (demo.py promts you to press the A button and prints a message when it is pressed).

I have absolutely no idea what went wrong. Is my unit just broken?

---

<div class="post-metadata">

**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\
**Post date:** [February 5, 2022, 11:39am UTC](https://forums.pimoroni.com/t/problem-with-pico-unicorn-pack/18797/2 "2022-02-05T11:39:17Z")

</div>

Did you try the Rainbow example?  
[pimoroni-pico/micropython/examples/pico\_unicorn at main · pimoroni/pimoroni-pico (github.com)](https://github.com/pimoroni/pimoroni-pico/tree/main/micropython/examples/pico_unicorn)

---

<div class="post-metadata">

**Author:** ![Jonas](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonas](https://forums.pimoroni.com/u/Jonas)\
**Post date:** [February 7, 2022, 8:42am UTC](https://forums.pimoroni.com/t/problem-with-pico-unicorn-pack/18797/3 "2022-02-07T08:42:11Z")

</div>

Yes, I tried it but didn’t work either :/  
I even tried an older release of Micropython  
So I think it’s safe to say that some part of it is broken  
Sadly I don’t have the knowledge and equipment do find out what

---

<div class="post-metadata">

**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\
**Post date:** [February 7, 2022, 9:32am UTC](https://forums.pimoroni.com/t/problem-with-pico-unicorn-pack/18797/4 "2022-02-07T09:32:24Z")

</div>

It does sound like something is borked? Some good info here and a function reference.  
[pimoroni-pico/micropython/modules/pico\_unicorn at main · pimoroni/pimoroni-pico (github.com)](https://github.com/pimoroni/pimoroni-pico/tree/main/micropython/modules/pico_unicorn)

Or contact Pimoroni via e-mail and see if they will replace it. I’d put a link to this thread in that e-mail.  
[Contact Us for Raspberry Pi Technical Support – Pimoroni](https://shop.pimoroni.com/pages/contact-us)