My mistake, I should have mentioned I have tried that and still ended up with a flickering/junk screen. I think at this point it might be a bad/defective cable.

This is my config, the things I've added are at the bottom of the config.
https://pastebin.com/K51c7n3a

I did not because I do not own a multimeter. My cable is an Adafruit A/V and RCA (Composite Video, Audio) Cable for Raspberry Pi [ADA2881] so I just assumed it would be correct and good for the Pi.

The past few days, I've familiarized myself with this and it's helped a ton, I've leaned a lot about WinSCP and SSH but I'm still encountering a problem. I'm getting audio but no video, video is at best, flickering black and white static/fuzz/noise. I've tried swapping the yellow/white cables, I've tried every combination, even multiple TVs and still no video, only audio. I've even tried other software, formatting and re-formatting to test Lakka/Raspian/Retropie and still no composite video.

Hey, thanks for the response! I've been working the past few days to get Putty and WinSCP up and running, however I'm having a problem with the command mount -o remount,rw /boot as it doesn't seem to be changing anything? I also don't have quite a clear understanding on where my config file should be, I understand it's write protected but in the boot folder of recalbox, I find no such file, even after following the "Access a partition for writing" section of the tutorial you helped me with. Could you please clarify this a bit more, I really appreciate the help so far.

Hi, just got a RP4 and wanted to connect it to an old CRT but I'm having major issues. Here's what I have:
-Board model: Raspberry Pi 4
-Recalbox version (build) : Recalbox (7.1.1 Reloaded)
-Hardware (Micro SD, Power Supply, etc.): CanaKit Raspberry Pi 4 4GB Starter PRO Kit
-Adafruit A/V and RCA (Composite Video, Audio) Cable for Raspberry Pi [ADA2881]

This is my config file: https://pastebin.com/YyUJp08Y

I'm brand new to all of this, I really am learning on the fly here, about SSH and commenting and un-commenting using # but nothing I try seems to work, I am getting audio from composite though, just never any sort of video. I really don't know anything about Linux or any of this so I'd appreciate any help because I'm at a total loss. I've tried reading up on these articles:
https://www.raspberrypi.org/documentation/configuration/config-txt/video.md
https://recalbox.gitbook.io/documentation/tutorials/video/crt/connecting-your-recalbox-to-a-crt-with-composite

...however I haven't figured it out, again, help would be greatly appreciated.