My problem came about because I wanted to hook my 360 up to my 22" widescreen monitor which doesn't have audio. Obviously I didn't want to play without sound and my attempt to plug the HDMI cable and the A/V cable in simultaneously met with futility.
My solution involves modding the Microsoft Composite A/V cable, which should have come standard with the system. I realize now, after doing a quick Google search, that there are a few other tutorials online on how to do this so I don't claim any credit for originality.
Step 1: Tools & Materials
- Small, thin flathead screwdriver
- Electrical tape (optional)
Step 2: Mod the A/V Cable
Find the seam on the connector for the A/V cable, wedge the screwdriver in there, twist, and crack that plastic shell open. You'll probably have to do it on both sides of the connector, no big deal.
Once the shell (and oh, so much empty space inside the plastic that does nothing) is off, use the electrical tape to keep the metal connector attached to the remaining plastic shell. Note, it will work without the tape, but it's probably a good idea to electrically insulate that a bit.