December 13, 20140 found this helpful
The GE "constant on" feature is suppose to keep the series of lights working if one or two burn out, however; if the white socket light burns out you can't fix it without voiding their warranty. Who cares! I have lived a couple of years with a section out on my tree and now 3 more sections went out. I bought the lightkeeper pro and found that entire sections had no electrical current but the lights worked when I tested them. So when I pulled the special white socket out and replaced the burnt bulb the section works great.
Just take care not to ruin the white socket when you pull it out. I suggest to gently pull on the bulb, the whole thing may come out easily; if not then pull out the bulb anyways, then unplug the tree and use needle nose pliers to remove the white socket doing as little damage as possible to the white socket itself. Replace with a new bulb and your tree's light section should work just like new!