I have a RCA Flat screen and Toshiba DVD player and surround sound box and the cable with red, yellow,& white plug ins on both ends, and a antenna in the window to receive local channels. Don't know if I got the cables hooked up right. Can't get any channels like we were before we tried switching out DVD players,. So when I hooked the Toshiba DVD player back up I am not getting any channels after multiple tries of channel searches. Please help if you can.