# Noob Question/Help

**URL:** <https://rpi-rgb-led-matrix.discourse.group/t/noob-question-help/152>\
**Category:** Uncategorized\
**Created:** [March 4, 2021, 4:32am UTC](https://rpi-rgb-led-matrix.discourse.group/t/noob-question-help/152 "2021-03-04T04:32:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![raspuser](https://avatars.discourse-cdn.com/v4/letter/r/919ad9/32.png) [@raspuser](https://rpi-rgb-led-matrix.discourse.group/u/raspuser)\
**Post date:** [March 4, 2021, 4:32am UTC](https://rpi-rgb-led-matrix.discourse.group/t/noob-question-help/152/1 "2021-03-04T04:32:41Z")

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Hello first time poster. I am just starting to get this working as part of a school project and cant seem to get this to work properly on hardware. I have tried running the following command

“sudo ./text-example --led-rows=16 ==led-cols=32 -f …/fonts/8x13.bdf”

I then type “hello” but I just get a lot of random flashing.

I have checked the wiring twice and am pretty sure i have it set correctly. I have the following hardware. Is there something obvious i am missing?

> **[Medium 16x32 RGB LED matrix panel - 6mm Pitch](https://www.adafruit.com/product/420)**
>
> Bring a little bit of Times Square into your home with this 16 x 32 RGB LED matrix panel. These panels are normally used to make video walls, here in New York we see them on the sides of ...

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<div class="post-metadata">

**Author:** ![raspuser](https://avatars.discourse-cdn.com/v4/letter/r/919ad9/32.png) [@raspuser](https://rpi-rgb-led-matrix.discourse.group/u/raspuser)\
**Post date:** [March 4, 2021, 5:28am UTC](https://rpi-rgb-led-matrix.discourse.group/t/noob-question-help/152/2 "2021-03-04T05:28:14Z")

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```auto
--led-slowdown-gpio was my issue! set it to 2 now its working like a charm!
```

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<div class="post-metadata">

**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\
**Post date:** [March 10, 2021, 10:39pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/noob-question-help/152/3 "2021-03-10T22:39:03Z")

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yep, rPi4 requires 2 because it’s too fast.