Fernando's career started at the early age of 6, tap-dancing with the children's musical group "Los Sony Boys". By age 7, and together with his older brother Sergio, they joined the legendary TV show "La Media Hora de Chabelo" as the singing duo "Los Hermanitos Arau. He had his first gigs as a musician, playing base and drums with his brother Alfonso and by 1970 they formed the rock band "La Ley de Herodes". In 1971 they performed at the Avandaro Festival.