Samsung CXD2512 25 in. Combo "remove red lines tv" Questions

...a DVD or VHS using the yellow red and white cables from the Samsung to the other player. you have to hit the vcr/tv button on the remote. there is a separate line that works for games and dvd

red light in the front does not work. I thought something might have just came loose but i dont really know. I do know about electrical equipment ebing is i am a mechanic so i deal with it on hmwvs so