I just bought a 50" panasonic plasma. I hooked it up using component connections from my sony HD receiver. also hooked up is a HD antenna to get local channels through the HD box. The local HD stations along with the directv local stations come in great. However, when I turn it to another channel (espn, discovery etc.) the picture glitches very bad. Everything worked fine with my previous HD sony tv. with the same set up. and yes, iv tried using HDMI cables but it does the same thing. Iv tried so many different things...any ideas? stating the obvious wont help because its been done.