I cannot get the screen where you change the settings of the cable box to appear on my Panasonic Plasma (TH-42PX60U). Right now I have to hook up a conventional TV to look at the settings and then re-hook the box up to the plasma. There are some settings I want to play with and I am trying to avoid lugging the other TV down two flights of stairs or discontecting a bunch of cords to move the box. Any hints to get the screen to appear would be greatly appreciated.
The box is fully connected, video and sound, to the flat screen. TV is on and the box is off then I press MENU on remote all per instructions but no screen appears.