Trying to connect my new Samsung Smart TV to my Technics DVD player on my sound system and the surround sound system. I used to connect it with a circular plug with four pins inside it, straight from the DVD player, into the matching socket on the side of my old Samsung tv.
Ok. Your TV does not support any composite, Svideo (that circular plug with four pins), or component signal. Your DVD only had composite (yellow white red) and S-video (4-pin). Your only way of connecting your DVD player is to use a svideo/composite to HDMI converter.
The connection your describe may be S-Video which is rare on new TVs. If your Technics has that then it also has a composite video output (a yellow RCA jack). You new TV should have a compatible input (sometimes shared with component video). Check your TV manual.