Re: Problem with interactive LED display–one quadrant doesn’t light up

[davidplotz]

Thanks Windell. I hugely appreciate the intervention. I will go deeper into this over the weekend, but a few quick answers

I replaced the one LED and still have the same situation with the dead ones, but I will reexamine it more closely on the weekend. 

I don’t have a multimeter.

I double and triple checked the resistors in the dim quadrant, and they all look good, unfortunately. Any other tips on that?