It does seem like all signs point to this particular cable box. But, what is weird is that I get video briefly and then it disappears.
I have a new LN46C670 TV and I have been having trouble with the HDMI connection from the Cox cable box. In fact, I'm on my 4th cable box -- all of the others have various problems, ranging from pixelated video (on one of the 2 tuners only), dropping audio, etc.
On this box, the component connection works fine. This indicates to me that the problem is not the wiring in my house.
However, when I switch to HDMI, the video shows only briefly and then disappears. If I turn the TV off and on again, the same thing happens. Video shows, and then disappears. There does not appear to be any sound when this happens either.
Curiously, the video seems to be 480p. Of course, I'd like 1080i.
So, even though the video shows for only a few short seconds, I can turn the TV off and on enough to re-program the cable box to send out 1080i instead. That is, I turn the TV, hit one button the remote to get the settings menu; TV goes blank. I turn the TV off/on and video shows again, and I do the next step to find the video settings, etc. Not fun.
Anyway, setting the cable box to 1080i does not seem to help.
Again, the component video works ok. HDMI does not.
I hooked up a BluRay player and this seems to work fine (video and audio) via HDMI.
The Cox people are suspicious. They said I needed a tech to come out ($$$) before they'd give me another box. So, I have that scheduled for Saturday. Ugh.
I'd like to use HDMI for this...