January 31, 20152 found this helpful
We have a GE prelit tree from Costco. We tried to figure out why so many branch lights went out. We found the 'unremovable' white rimmed bulbs and pulled them out. Some came out whole, others bulbs wire broke and the white interior was removed with a needle nose pilar, with tree unplugged.
When we plugged tree back in most of the strands were working. The problem plug that didn't bring the lights back on was not making the connection inside the plug like the other removed plugs did, so with a small screw driver and the lights power off, we carefully pushed the connectors inside so they touched and voila' our tree had all the lights back on.
On a 9 ft tree there are about 7 of these 'special' bulbs. Baa Humbug to GE. We don't have to buy another tree. Hope this helps you.