I’m trying to set up a pretty old DVD player to my fairly recent RCA tv. I have gotten it to work before with good picture but can’t quite remember how. I have my rca cables plugged into the DVD player and then the other side plugged into the tv. The volume is perfect and I have picture but it’s very grainy and gray. Am I missing something to plug in? There’s no option for HDMI on the DVD player so I can’t use my cords. Any help is appreciated.