When I put a show on hold because I get a phone call and leave the room for 20 minutes, for example, the picture never defaults into a screensaver mode. I have two large plasmas, and the oldest one from 2010 gets image retention (Samsung 8000 series). This scares me. My 612 used to burn the guide boxes into the screen, and you don't stay in the guide for very long, usually. Is there any fix to same by displays?