Connect Magnavox DVR to Samsung via Composite
I'm trying to connect a Magnavox DVR (MDR557H) to a Samsung Smart TV (UN40MU7000F) via composite or component cables (yes, I can use HDMI, but there's a reason I'd like this to work) but Samsung says "no source" when I try the composite & gives no option when I try component.
The Samsung TV (Series7) has two options for A/V. There's a yellow input for composite. So I insert the small yellow cable (yellow input) with white, yellow, red connectors on the other end which I attached to one end of the composite cable with the other end of the composite cable attached to the composite OUT outputs on the DVR (white, yellow, red). I select the A/V option on the TV (one of the Sources) and it says no source found.
So I tried the RBG. There's a little cable with a blue input and two connectors (red and blue). I attach those red and blue cables to the red and blue connectors on one end of the rbg cable (leaving the green connector open). I plug the other end of the cable (red, blue, green) into the RBG outputs on the DVR. When I do this and go to the Source selection screen on the TV, there is no A/V option of any kind.
Any advice, suggestions?