December 5, 2012 at 7:10 pm #21059
If voltage is getting to the LED, it is likely that the resistor is good, and that the chip is sending a signal there. (Either that, or you’ve got a short circuit that is causing the voltage to get there…)
One thing not in your list that can go wrong– and commonly does –is that an LED is installed backwards. If you have an extra LED in your kit, you can try placing it against the pins of the non-lighting LED, to see if the LED in that position is either broken or backwards.