I have a problem with my Panasonic TH-50PX25 but the factory has been no help. The unit will lose video and audio on all channels (both cable and antenna). After a couple of minutes the signal will return to normal. The on screen display still shows the channel info but there is no video. Panasonic claims they have never seen this problem before. The technician came out and checked out the unit but he says everything is working normally.