The DVI connection will give the best picture (1080P) but no audio will go through it. The 990 passes video through the DVI connections from two other sources but will not pass any analog signal or menu signal over DVI since DVI is digital. In order to use the on screen menu connect an S-Video cable from the TV to the monitor out port on the 990. If you do not want to use DVI (don't know why) the component and S-Video ports can be used for low quality video.

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DVI inputs/output (see pages 20-21) This digital video connection provides the best possible picture when you are using a DVI- or HDMI-equipped video source and video display. (Inexpensive DVI-to-HDMI adapters are readily available.) Analog video sources and on-screen menus do not appear on the DVI output.