Weird Happening on HDTV

Loose plugs.

Or the circuit boards inside need a couple minutes to warm up (possibly loose contacts in the circuitry).

Or you forgot to pray correctly.

I'll consider numbers 1 or 2. If keeping appliances in working order were correlated with prayer, I would be sitting here in the dark!

It could also be that you just happened to turn it on at the wrong second. The HDTV I have in my bedroom does almost the same thing if the signal level drops out ffor a second or two. Some times it comes right back, other times it takes a minute or two for the digital bits to resync themselves.

Well, it hasn't happened since the time that I mentioned. So far, so good. You may be right, fishin'. Tampa Electric is notorious for its momentary shutdowns.

It's the decompression of the HD signal from the cable. Unfortunately, this same compression/decompression that is used over cable to give one an HD picture within the bandwidth available at this time (especially without optical connection directly into the home), there are various anomalies and that happens to be one of them. This combined with the interlacing shows up most on plasma TV's if one is too close to them. 1080p would solve the problem but we might all be six-feet-under by the time 1080p hi-def is broadcast and on cable, and it's likely to be compressed and decompressed.

LW- Thanks for the explanation. It has not happened again.