DC Boarduino - No Red LED Blink
I built a Boarduino for the first time, and the green LED lit ok with the DC power supply as it is instructed. However, the red LED does not blink three times when I press the reset (C6 is soldered). Where and how should I start to correct the case? There were two jumper pins included in the product package, but I used just one for "ext" according to the instruction. Would this be wrong? Other than the one remaining jumper pin (and a few pin headers), I used all the parts...