Check for continuity between your cable outputs and where you have it wired. Some TRRS to AV cables have different pinouts
I tested everything,the cable I made is fully wired ,and has:tip for left channel ,ring 1 for right channel,ring 2 for ground,and sleeve for video,and the trrs out is set for this cable,but I have to test it another time, another thing is that sometimes when I turned on the screen becomes black and then no signal,I think the little chip makes problem