Can't get composite on small TFT screen working

[lumoro07]

Hey,

I have a 3.5" NTSC/PAL TFT Display connected to a Raspberry Pi B+, i have the porta pi image (Retropie + Emulationstation) running on it.
The thing works on my arcade cabinet which has a 19" LCD display with a DVI output and it works on my LCD tv but not on the small TFT display.

I know the pi can only output HDMI or composite so i tried editing the /boot/config.txt.
The config.txt file was almost empty, there was only one line in there for the GPU.

framebuffer_width=320
framebuffer_height=240
sdtv_mode=0
sdtv_aspect=1
hdmi_force_hotplug=0
hdmi_ignore_hotplug=1

Now it's not working on anything anymore (Not to worry, i have a backup image and plenty of SD cards).
It did change the resolution but stopped working after i added hdmi_ignore_hotplug=1 (which makes sense) but it still won't work on the TFT display.

Anyone knows what i'm doing wrong?

[lumoro07]

Well, i found out what went wrong. Apearantly i used the wrong cable, i used a audio/video jack -> audio/video cinch, i read somewhere that you need to connect the audio too for it too work but i haven't tested that myself.

I switched to using a RPi B instead of a B+ (because it has a normal composite connector) and connected the screen to the pi with a normal cinch cable.

[fruitoftheloom]

Well, i found out what went wrong. Apearantly i used the wrong cable, i used a audio/video jack -> audio/video cinch, i read somewhere that you need to connect the audio too for it too work but i haven't tested that myself.

I switched to using a RPi B instead of a B+ (because it has a normal composite connector) and connected the screen to the pi with a normal cinch cable.

http://www.raspberrypi-spy.co.uk/2014/0 ... video-jack

[drgeoff]

...... i read somewhere that you need to connect the audio too for it too work but i haven't tested that myself.

When you do test that you'll find it is not true.

[lumoro07]

http://www.raspberrypi-spy.co.uk/2014/0 ... video-jack

Thanks, that clears things up for me! I tested my cable with a multimeter and it turns out it's the MP3-version.