Hey guys,
I am trying to make a portable (handheld-ish) console with my raspberry pi. I was able to get PiPlay/PiMAME working for a number of games I wanted it to support (NES, SNES, Playstation, GBA) and had up 'till recently been using the HDMI out on the pi. now that I have switched it over to use the RCA out, all I get is a black screen when I try to start the playstation and GBA emulators up.

I am using Rasbian and installed PiMAME via the git script method.
Does anyone have any ideas as to what I should check or what might be going wrong?