Had an HP laptop running XP, with S video output. Had coaxial cable running from old TV to RF modulator box. S video cable from box to PC, RCA audio cables running from box to headphone jack in PC. Have a new Toshiba running windows 8.1. Old set up doesn't work. New computer has RGB port, no S video. Have purchased RGB cable with one end S video other RCA video. Does not work. TV is 10 years old. No inputs in back of tv except coaxial.
How can I switch or extend my PC to my TV?