# LED turning on with disconnected controller

**URL:** <https://wled.discourse.group/t/led-turning-on-with-disconnected-controller/8975>\
**Category:** Issues\
**Created:** [August 12, 2023, 10:10pm UTC](https://wled.discourse.group/t/led-turning-on-with-disconnected-controller/8975 "2023-08-12T22:10:03Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://wled.discourse.group/u/Kai)\
**Post date:** [August 12, 2023, 10:10pm UTC](https://wled.discourse.group/t/led-turning-on-with-disconnected-controller/8975/1 "2023-08-12T22:10:03Z")

</div>

Hi,

after I set up my first WLED project, I noticed a few hours later that the first LEDs of the strip turned on.

At first, I thought it might be a wrong setting in WLED. But no… In WLED, it shows that the strip is turned off. So, I completely disconnected the controller. And after a few minutes, the first LEDs lit up again.

I use the following Hardware:

> **[BTF-LIGHTING RGBW RGBWW Warmweiß SK6812 5m 60LEDs/Pixels/m 300LEDs Individuell...](https://www.amazon.de/BTF-LIGHTING-Individuell-adressierbar-Traumfarbe-nicht-wasserdicht/dp/B01N0MA729)**
>
> BTF-LIGHTING RGBW RGBWW Warmweiß SK6812 5m 60LEDs/Pixels/m 300LEDs Individuell adressierbar Flexibel RGB+Warm White 4 farbe in 1 LED Traumfarbe LED Streifen Nicht wasserdicht IP30 DC5V : Amazon.de: Beleuchtung

> **[Alitove 5V 20A 100W AC 110/220V DC LED-Treiber Schalter Netzteil Transformator...](https://www.amazon.de/ALITOVE-5V-Schaltnetzteil/dp/B0B8H3JTLP)**
>
> Alitove 5V 20A 100W AC 110/220V DC LED-Treiber Schalter Netzteil Transformator Stromversorgung für WS2811 2801 WS2812B WS2813 APA102 LED-Leiste : Amazon.de: Baumarkt

And an ESP 8266, which I can´t link here, as I am a new user

I connected the power supply directly to the strip. The ESP is connected with the data cable and the ground. Where are these instructions for the strip coming from, and above all, how can I fix this? Is the power supply the cause of the issues?

---

<div class="post-metadata">

**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [August 13, 2023, 3:33am UTC](https://wled.discourse.group/t/led-turning-on-with-disconnected-controller/8975/2 "2023-08-13T03:33:01Z")

</div>

In LED Preferences check the box that says ‘Off Refresh’. You are experiencing noise on your data line.