Originally posted by gonk:
Since the DVD player is bypassing the 990, you currently can't get video from the 990 on that input. As stickpony suggests, routing the video from your DVD player through the 990 will allow you to leave your TV in a single input (video5, presumably) and have access to the 990's menu at that TV input.
One thing to note, however: the 990 will display the OSD menu on top of component video inputs, but it will only generate the on-screen "pop-ups" (volume changes, input changes, surround mode changes) with composite or s-video inputs. If by "adjust audio" you mean that you can't see the 990's front panel and are trying to get access to those pop-ups, you may want to retain the (presumably s-video or composite) connection to your TV's input 4 and perhaps use picture-in-picture to see some of that information.