The 990 cannot output digital video sources (DVI) through the component video output. When using the component output from the 990, you need to provide an analog video input of some sort - and in the case of a DVD player, that analog video input should be component.

While we can expect future surround processors to transcode analog video inputs (composite, s-video, and component) to digital video outputs (HDMI) - something that the 990 does not support - copy protection issues will prevent manufacturers from ever offering the ability to steer digital video inputs to analog video outputs.