I booted up my OPi0 + $2 expansion board this weekend after reading through the doc on it warning about TVout problems. Used the legacy Xenial 5.25 build available.
I used the USB-serial method and logged in from my PC via SSH later over WiFi. On the TV there was no desktop GUI display, just the regular login prompts CLI.
So this is not a RCA composite cable issue, but likely a display one...my TV is 720p.
1. On the TV I just got the login prompt after the text based Orange Pi Welcome screen. After logging in it stays text, as if I were in Terminal.
I tried to install:
$sudo apt-get xorg lightdm xfce4 tango-icon-theme gnome-icon-theme, from a YouTube video to attempt the GUI display on TV:
After this video follow, via VNC client on Win7 PC I could see the Xfce screen, but only the same login prompt on TV display.
So I removed lighdm ...
Then I used Igor's lxdm setup with auto log off (under the title for lxdm and other Desktops.)
This resulted in a repeated display on TV like " [097.577174] [AP_WRN} {STA} ASSOC HTCAP 11N58" with only the first entry changing, without any login prompts or Welcome text screen.
(BTW, these repetitive text lines also appeared with the login screen in between command typing after I did above install before Igor's.)
2. While we are at it, how can I automate tightvncserver login at boot?