We have built a ring consisting of 19 Adafruit Neopixels (white)
We were testing it happily using various FastLED demos and it was working as intended, however something seems to have happened and now the ring doesn’t work properly.
Now only the first two LEDs light up.
The voltage is still travelling around the whole ring, and it seems the data is as well as the timing of the patterns is consistent with how it was when it was all working.
We’ve tried various codes and the same thing is happening.
We cut LED19 which wasn’t working in the circuit off and tested it individually - it worked.
Can anyone please suggest how we could test / repair this further without desoldering the entire thing?