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Background: Pi 3 B+ connected to an old tube TV with front composite video connection.

I've installed NOOBS on a 32GB microSD card, and am able to successfully boot it, using the keyboard 4 key (NTSC) to display the graphical installer. After the install finishes and the Pi boots, I can no longer get any video to display.

I have set sdtv_mode=0 and hdmi_ignore_hotplug=0 in the config.txt on the /boot partition of the SD card.

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    You are unlikely to get help on NOOBS very few use it. /boot is ambiguous, the Raspbian boot partition is only mounted when it boots; NOOBS has its own. – Milliways Jul 10 at 23:48
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    @Milliways okay, that piece of info might be just what I needed to progress further. I'm going to try a bare Raspbian install and see where that gets me... – troytc Jul 11 at 5:25
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According to the forum topic posted here, the newest version of Raspbian (Buster) had an option added to support the Pi 4 that broke component video out. Downgrading my Raspbian version and using a bare install solved this issue for me.

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