I have connected the component video monitor out to my TV but I can't see the on-screen menu.
First, it may be helpful to verify that the physical connections between the Rotel component and the monitor are correct and that the monitor is on the correct input. If the component cables are in the right place and you are sure you are on the correct input of the TV, simply power cycle the Rotel component off and on. When the unit first powers up, a "System Status" screen should appear on the TV for a few seconds, then disappear. If this screen appears, the connections are correct. If it does appear, this confirms the connections are correct and you should be able to access the menu by verifying the remote is in the AUD mode by pressing the "AUD" button, followed by pressing the Menu/OSD button on the remote.