I have three sets of C9 LEDs in a series and I am having problems. Should be simple, right? Set #1 works fine. Set #2 is plugged into the first and works up until a cylindrical object housing a diode/resistor or something. The bulb before and everything after, dead. Bought a new string to replace it thinking the string might be bad. Plugged it into string #1 and all the lights worked. Before I could get the last few attached to the roof, half died again. Right in the same spot. Took one set in the house and checked fuses, which looked ok. Checked bulbs and not sure how easy it is to spot a bad LED, but they seemed ok. I even tried bypassing the diode/resistor or whatever, but nothing got the 2nd half of the string to light. On top of that, my third string which was working, went half out in the same spot as the other two. The only string completely working is #1.
Anyone have any explanation or fixes for what is going on? I am getting very tired of climbing up and down my ladder.