I just got a new Raspberry Pi 3 with wifi. It works fine using the HDMI output, but I need to use it for a composite video project on an old PAL tv.
Just plugging it in with a composite video cable does not work, no output is visible. I have tried pushing 1,2,3,4 buttons, with and without shift.
I have edited config.txt as administrator, and added the line:
# pal mode sdtv_mode=2
After rebooting, still no output is visible. The hdmi cable is not connected.
Could this mean the composite out is simply broken? The connector feels very loose. (The cable easily falls out).