# Plasma 2350W with Flexible RGB+W LED Strip (COM3204) not lighting LEDs

**URL:** <https://forums.pimoroni.com/t/plasma-2350w-with-flexible-rgb-w-led-strip-com3204-not-lighting-leds/27649>\
**Category:** Support\
**Created:** [April 19, 2025, 2:48pm UTC](https://forums.pimoroni.com/t/plasma-2350w-with-flexible-rgb-w-led-strip-com3204-not-lighting-leds/27649 "2025-04-19T14:48:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![horse](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/horse/32/11103_2.png) [@horse](https://forums.pimoroni.com/u/horse)\
**Post date:** [April 19, 2025, 2:48pm UTC](https://forums.pimoroni.com/t/plasma-2350w-with-flexible-rgb-w-led-strip-com3204-not-lighting-leds/27649/1 "2025-04-19T14:48:44Z")

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So I brought a [Plasma 2350 W](https://shop.pimoroni.com/products/plasma-2350-w?variant=54829890601339) as well as [2m of the 60p/m Flexible RGB+W LED Strip](https://shop.pimoroni.com/products/flexible-rgbw-led-strip-neopixel-ws2812-sk6812-compatible?variant=30260032700499).

I can’t get the LED strip to work at all.

I have the `plasma_2350_w-v1.0.0-micropython-with-filesystem.uf2` firmware from the releases page - [Releases · pimoroni/plasma · GitHub](https://github.com/pimoroni/plasma/releases)

All the examples run / work, but nothing actually happens with the LED strip. The Plasma on board LED does work, the button input is recognised, but nothing on the LED strip.

 ![image](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/0/0f85be3fba195de8ffac56cb2556193bb7e9b829.jpeg)

I have the 3 pins from the LED strip going to the correct places on the board (sorry the other socket connected to the plasma has contradictory colors)

white (ground) \> negative terminal  
green (data) \> DAT terminal  
red (5v) \> 5v terminal

The additional red + black wire on the LED strip, I presume are not needed?

Is the strip DOA? Any ideas?

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<div class="post-metadata">

**Author:** ![horse](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/horse/32/11103_2.png) [@horse](https://forums.pimoroni.com/u/horse)\
**Post date:** [April 19, 2025, 4:28pm UTC](https://forums.pimoroni.com/t/plasma-2350w-with-flexible-rgb-w-led-strip-com3204-not-lighting-leds/27649/2 "2025-04-19T16:28:33Z")

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so it turns out the connector soldered + glued to the leds (out of the box) was on the wrong end. it needed the arrows on the led strip to point AWAY from the microcontroller (thanks @ahnlak for pointing this out on discord)

 ![image](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/e/e7442137709d378cd4fface673067841749bd400.jpeg)

so with that in mind, it now works, but the leds aren’t powered until the end of the strip, and they’re not very bright, do I need an additional power supply for these?