How do I enable auto change over on the TH4210U2002, TH4110U2005?

1 Press and hold Menu and + buttons for approximately 5 seconds to enter advanced menu.

2 Press Select to enter System Setup (ISU) menu.

3 Press Select to cycle through System Setup numbers.

4 Press + or - to change values or select from available options.

5 Press Select to save changes and advance to the next System Setup number.

6 Once you have cycled through all of the System Setup numbers, “Done"" is displayed. Press Select to save and exit. To save and exit early, press Home to return to the Home screen.

Setup Step 300 needs to be set to 1 for Auto System Change Over