With the 970, the on-screen setup menu will only be visible via component video output when a composite or s-video source is active (the menu is overlayed before the signal is transcoded to component). With the 990, the on-screen setup menu is available with component video inputs because the 990 replaces the incoming signal with a 480i black screen and draws the menu onto that.

In both cases, on-screen display "pop-ups" (volume, input, surround mode) are not available with component video inputs because neither unit will overlay data on top of a component video input.