Hi Vblue42
Thanks for your continued support with this. I've tried what you suggested, even resetting the phone. I've uninstalled AppRadio, and AppRadio extensions from Cydia, then rebooted and reset, then re-installed both, then reboot again. I've also re-installed the likes of Angry Birds after all that to see if they work. I have discovered that when linked to the head unit, I am getting sound from the apps (I tried Angry Birds and I get sound but just a blank screen, although the sound will even come over the top of any mp3s currently playing.) I've even changed TV out in settings from PAL to NTSC to see if that helps but to no avail. Is there a setting I'm missing somewhere? In extensions I am allowing "unsupported apps" and going in and switching a few of them on. I was starting to think it was my cable but the standard apps work ok from the phone to the head unit and so does mp3 playback. So I guess, we've ruled out the cable.
Two things I was considering:
Is it possible my head unit has a "newer" version of appradio software that's incompatible with the extensions? I keep reading of "AppRadio 2" but I'm assuming they mean the app for the phone.
Could my jailbreak be at fault? (Everything works though!?)
I just keep coming back to Extensions and that for some reason it's not working with my head unit.
Please please, any more help or suggestions is really appreciated.