I have a new Slim 360 and because I'm connecting to my monitor (which has no speakers or sound output), I need to use the HDMI for video and a RCA audio adapter for sound.
Here's the audio adapter I have.
As far as I can tell this should work just fine right? Well for some reason as soon as I plug in the audio cable, the picture on the screen turns black.
Does anyone know why this might happen? This is the only way I can get sound so I really need to figure this out.
The 'easiest' solution would be here. All in one solution to convert the audio to 3.5mm jack and a VGA (which your monitor should support - otherwise convert from there to DVI).
I have the same setup, although I use optical audio, and it works just fine.
Microsoft recommends you check these things:
1) Monitor is on hdmi input.
2) AV Cables are securely connected. (I'd bet it's this one, the slim is pretty tight in there, and I could see the audio adaptor pushing the hdmi cable out of place)
3) If your audio cable has an hdmi or composite selector, switch it to composite. I don't think your connector does.
4) Reset the xbox display options. Make sure the disc tray is empty. Turn on the console. Press and hold the right trigger and the Y button on the controller.
There are further support docs linked from there if none of that fixes your issue.
I know this question is old, but I stumbled upon it while experiencing this problem myself. This issue occurs when your system has Display Discovery enabled.
Go to Settings > Console Settings > Display Discovery and switch to 'Disabled'
This will allow you to use HDMI with RCA audio. You will have to manually input your monitor resolution in settings.
