LEDs Not Working Anymore

Hello,

I’m experiencing an issue while using Hyperbian OS on my Raspberry Pi 4. Yesterday, I changed the wiring between my power supply, the Pi, and the LEDs. Since then, the LEDs have stopped working.

I used a multimeter to try to locate the problem. The +5V and ground connections seem fine, but when I measure between GND and GPIO18, I only see a small oscillation between 0V and 0.2V.

To check if the GPIO18 pin is the issue, I ran a simple Python script to blink an LED. The signal from the pin alternates correctly between 0V and 3.3V, so I don’t think the pin itself is the problem.

Any ideas on what might be causing the LEDs not to work?

Even if I connect my Pi to a different LED, GPIO18 should still send the same signal, right? So even if no LEDs are connected and I measure the voltage, I should still detect a signal, but I'm not getting anything.

that one ?
https://pastebin.com/2XAGXk4P

Okay, I'm freaking dumb. Thanks a lot for trying to help me. I just thought the orientation of the LED didn't matter, so I did that :

I reversed it, now it works perfectly .