I have a Raspberry Pi 3 Model B v1.2. It works great on my TV that has HDMI port, but I am trying to hook it up to a TV that only has A/V and Composite Video inputs. From what I understand, I needed to buy a 3.5mm to A/V cable so I could plug into the 3.5mm 4-pole Composite Video and Audio Output as seen in the below image.
I've done this, and I can not figure out how to make it work on this older TV. It doesn't seem to do anything when plugged into this port. Do I need to make changes to the config.txt file to force output to this Composite Video port or is there something else I am missing?
This is the cable that I bought to connect it. https://www.amazon.com/gp/product/B00CIC9KW2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1