I don't know if LED makes a difference but, YES! do try replacing the fuse! I stumbled onto that last year. Some decorations are so inexpensive it may not seem worth fussing with, although it's SO easy to check, and keeping them out of the landfill is important to me. But others, as my Front-Gate wreath that honestly isn't worth what I paid, are worth an attempted rescue. In that case, 1/4 of the wreath wasn't lighted. I replaced the fuse in that plug (there are 4 in the wreath) and it's good as new. Makes me wonder how many 'good finds' there are to be had at the little thrift store down the road! Merry Christmas!!