I own an old VIERA® panasonic 50" TV. and a pretty old Onkyo 7.1 Home theater system.
Whenever I turn on my TV I can only view standard def channels. I need to wait about 10-15 minutes before I can switch to HD channels. I also have a PS3 that I can't use until my TV is "warmed up". I suspect the cause is Onkyo 7.1 Home theater system but I don't know for sure.
I also have a Comcast DVR.
Anyone heard of this before?
From looking at my previous posts it looks like I have this Onkyo system: HT-S9100THX HTIB