Why does my comcast HDTV box emit a green screen over its HDMI cable -- while component works great?

Question

I switched boxes, and the same problem occurs. I see a picture for 3 seconds, then it blanks out and goes all green.

Answer 1

I would call Comcast. It's supposed to work. I had problem with our HD PVR and a similar HDTV connection... partly it was that the TV kept trying to adjust to 480p, 720p, 1080i, etc. What worked well was to force the set-top box to a single resolution (the native resolution of the HDTV). At least then it didn't have to keep switching. It's obviously something in the HDMI handshaking.



But if that doesn't help things, then call Comcast. It's possible that your HDMI port isn't enabled, but then I would think you'd get no picture, not some picture for 3 seconds.

Answer 2

HDMI cables totally helps 1080p (quickly each and every thing will convert to 1080p) at the same time with blu ray.... because HDMI is a digital interface, it delivers the superb high quality of the video when you consider that there aren't any awful analog to digital conversions as are required for all analog connections (at the same time with element or S-video). the version is amazingly important at larger resolutions at the same time with 1080p. digital video will be sharper than element, and eliminates the softness and ghosting chanced on with element. Small, extreme comparison info at the same time with textual content carry this distinction out the most.

Answer 3

Most Dvd players with component and HDMI out have a setting in the Main menu for the unit where you select comp or hdmi out.. try the same on your box because the same thing happens with a dvd player.

Answer 4

Comcast cable HD in my area will not work with HDMI. Their boxes do not even have HDMI ports.

Answer 5

Make sure that HDCP isn't biting you. If a device is using HDCP encoding (to stop pirating of digital signals) to send the signal then your monitoring device has to have HDCP compliance too.



What you are looking for is if it is HDMI w/ HDCP on the box and not on the monitor. That is the only combination that won't work.