I have my xbox 360 connected to a monitor through HDMI. I have always had the Auto-detect screen on, and used to work well, but unfortunately now the console thinks that I have a DVI connection so I wasn't able to hear anything. I decided to switch off the auto-detect screen, so I was able to configure the HDMI output, but when I configure it to 1080p, the image is showing in a rare way, it shows red pixels in some places and sometimes the screen goes black.
I have tried it in a FullHD TV and with another HDMI cable and continue with the same problem.
Does anyone know what is happening?