I have the 3GS and the official Apple A/V Composite cable. When I was on 4.2.1 JB, the built-in video out capability worked fine playing movies when connected to my TV. Since upgrading to 4.3.3 and running the untethered JB with Pwnage, it no longer displays video on my TV, just plays audio. I've installed DisplayOut and that works, though the video quality is not as good as the original. Any ideas?