Originally Posted by bryher
Ok here's what happened and what I learned...
I did what was suggested above. Turned everything off. Connected the blu ray home theater directly to HDTV HDMI input. When I turned it on it said "receiving data..." For a few seconds, as expected. But then nothing except a blue screen that says no signal. This is what's been happening. So....
I've made some progress with my fios HDTV cable box. "Sometimes" it works with the hd signal. Most times only the standard channels work and the hd channels show video only, no sound. But I figured out a pattern. If i leave it on an hd channel (silent with video only) and then shut off the fios box and disconnect the HDMI for a few secs, then reconnect HDMI and turn in the fios box, the hd channel works fine! Then after moving around the channels a bit using the remote I eventually lose hd sound. Then only standard channels work fine.
This is really strange. Any ideas?
OK. That makes some sense.
I think you're getting bit errors likely causes by one of your HDMI cables. Assuming that you are using "native" for the resolution, when you go to a standard definition picture, you are using much less bandwidth than when you run a high definition picture. Think of your HDMI cable as a pipe and the digital information in the pipe as water. The pipe is only a certain size. When you run standard definition, all of the water flow can move through the pipe without a problem. When you go to high definition there is much more water per second flowing through the pipe and your pipe is not big enough to handle all that water flow, so it backs up.
I suspect that it is the 15' (or so) cable. Unfortunately some of the older longer cables have manufacturing issues. So, look for a cable that is less than 15' that is listed as "High Speed". The High Speed wording is the key. You should not need a High Speed cable for FIOS but it won't hurt and you can get one for less than $15 (check Monoprice if you have problems finding one). Remember, it must say "High Speed" on the advertising.
To confirm the theory will take a little work. What I'd like you to do is to temporarily move the FIOS to the TV or the TV to the FIOS so that you are only using one of the shorter cables. Try first with just the 6' cable. If everything works OK, then stop. If not, try the 3' cable.
Also disable anything on the TV or FIOS menu related to "Deep Color" - that option eats bandwidth for no real world gain. Also change your resolution on the FIOS box to 1080i temporarily. You may find that even with the 15' cable by changing those settings your problem just might go away. I don't think it is your TV's HDMI ports since I can't see the TV working and then not working and then working again without powering off the TV unless something was very loose or there was some type of strange heat issue.
Finally, for anyone reading in the future, there is a section of the AVSForum for HDMI issues. It's down towards the bottom of the forum list ("HDMI Q&A"). There are people there who, while we may not like HDMI, have a good understanding of how it works.