I have a RCA 20F4T TV-without the remote-I want to hook up a VCR -Panasonic Model PV-S7670 & an Emerson EWD7002 DVD player without any cable/direct Tv etc connection. I want this just so my grandsons can watch movies & dvds. I have connected the red, white, yellow from the TV to both of the above. I know I've done this in the past-just can't get it to work now. Thanks