A bulb is not working on the signal side. The Vintage Kenwood Model KT-5000 Solid State AM/FM Stereo Tuner is a high-quality audio component from Japan, known for its reliability and performance. With its classic design and brand reputation, this tuner is ideal for those looking to enhance their vintage audio setup with a piece of history. The KT-5000 model offers a range of features, including AM/FM capabilities, making it a versatile option for any music lover seeking a unique and retro audio experience.