Need help pinpointing problem with LED Christmas tree lights. I have a strand that lights up when plugged in. This strand will stay on for a few minutes, then go off. They will stay off for a couple of minutes and then come back on. This happens continuously. I have looked at the wiring and bulbs and cannot find a problem. I am wondering if it could be in the resistor for that strand? Sometimes when I move it around, it seems like the lights go on and off, but not all the time. If it could be in the resistor, can that be replaced easily? Any info/guidance greatly appreciated.