I have 8 RGB LEDs in a Row. Each RGB LED has 3 GPIO pin to control the color Red Green and Blue. I used all available GPIO pins. I works for the 7 RGB LEDs. One LEDs does not light properly for 2 colors. I check the GPIO Pin and it's the 9th and the 10th. It's written MOSI and MISO as well. I don't know if that's related to the problem.
Why those two pins cannot light the LED?