The big question is what are your tuners tuned to while you are in playback. There is some evidence that if you are tuned to an XM radio station, you will get the screen saver; the solution being to record something on both tuners from a regular channel, just a few moments will do. That will ensure both tuners are no longer on an XM channel or other similar channel, and might make the screen saver go away.
Good luck,
Tom
Good luck,
Tom