It has no effects on the operation of the machine and as you say it is simple annoyance matter. But I'm getting used to it because I watch movies on the little screen and it is no more a distration from wathing . You just look at the only thing lite the screen. I just wanted to know if it would effect the projector. I only use the Elmo to sometimes watch my nice collection of super* movies. It is my Hobby to colect, I have 3 reels of 1930's King Kong B/w sound ,Ten Commandments, Ray Harryhausen films, Superman Cartoons from the 40's, etc. Just to name a few in my collection. Anyway this is the 3rd Elmo HiVision SC-18 2 Track sound projector Ive owned in my life I love them. It could be the bulb or diode led, or fuse as you say, or wirering. But if it has no effect on the movie watching I guess I could live with it. I get a ignition sound when I plug it in anyway to know it is working. These projectors last a long time I mean the motors and sound systems. The only trouble I ever had after years of use before VHS ,DVD,or Blu-ray was after I was using my Elmo SC-18 was that the control switch seem to get striped from turning it on and switching to forward and rewind allot. The rewind stop working and I had to turn the reels around to rewind using forward. Anyway I lived with it till I sold the projector. I just bought a refurbished model in mint condition except for my trouble with the diode. It could be the fuse or bulb after playing a much of films it just blew out when I went to plug it in one day. You seem to know allot about elmo projectors . Can you tell me more about the one I have.