RGB LEDs Not Working; Suspect PCB

[JTuuParticipant]

Hi Hojin, I have a problem with my b.mini and I’m trying to figure out if the PCB is at fault. The first four LEDs are fine, but the fifth one didn’t turn on when I plugged the keyboard in to test it. I figured I had burnt out the LED while soldering it, so I replaced it with a new one and made sure the number of LEDs is correct in the software, but the problem persists. I don’t think the LED itself is the problem anymore; I suspect that maybe the PCB is damaged near this area.

How would I figure out where the problem is? Thank you!

[JTuuParticipant]

Here is the first non-working LED. It has a little more solder than the other ones because I thought maybe some connections weren’t made and added some solder to be sure.

http://imgur.com/a/tqrZw

[JTuuParticipant]

I solved it! The issue was with the signal out (bottom left in the image) pin of the previous LED, not with the broken one. I resoldered that pin and now it works perfectly!

For anyone with RGB problems, note that the problem can be either on the first non-working LED OR on the last working one.

[Author]

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