02-07-2013 08:51:26 AM
I am a repair technician and have dealt with multiple hdmi compatability issues with multiple brands of cable boxes and TV's and many intermittant video and audio symptoms can be easily alleviated by accessing the service menu or hidden system settings and making changes in nearly all cases. Could you please tell me how to access this second level in these particular models as there is no information available anywhere else? What I need to be able to do is to disable 480i output. I have personally dealt with hundreds of clients that making that change had alleviated the symptoms they experienced whether they were constant or intermittant. If I get answer to this (that works) I will post a list of the majority of the symptoms I am referring to.
02-07-2013 09:39:52 AM
Here is the manual but I don't think your going to find what your looking for. It sounds like you want to be able to remove the option of 480i in the screen resolution menu. That's not going to happen. You can try tech support tier 2 but I doubt you will get very far. I'm sure they are not going to re-write the software to allow that option.
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02-07-2013 10:09:53 AM
Then AT&T will keep having complaints and customers switching to a different provider until they do make it accesable. We are able to access these settings in all other cable boxes although some were difficult to find or figure out how.
02-07-2013 10:11:06 AM
02-07-2013 10:27:13 AM
It has alleviated many symptoms in the cicso boxes that there is access to. You disable 480i standard (or normal) and 480i out widescreen and this alleviates the same and similar issues that occur with Motorola cable boxes. I had three clients in one day that it fixed the issue, One of them an LG television 1 month old that the client describes the picture has " jitters " or " jittery " (as a technician I would describe it as horizontal tearing). and his constant issue disappeared instantly. This was a new issue to me but I had learned there are dozens of symptoms cured by this, some for more often than others. Generally speaking the majority of clients immediatly say that channel changes is quicker.
02-07-2013 03:42:45 PM
The output is the output. If the output is set to 720p or 1080i, then that is what is output from the U-Verse boxes (Motorola or Cisco ) under all circumstances. Once the box is outputting one of these resolutions, "disabling" the 480i choice in the menu won't change the output signal at all.
02-08-2013 07:59:49 AM
I don't "believe" that it causes anomolies I have verified and documented these for years. The primary issue is with those boxes that provide variable output resolutions. Nearly all Motorola boxes give you the options (in the hidden user options menu) to change the output of the non-hd content to Off, Stretch, 480i and 480p. The issue is "handshake" related. The most common symptoms are
when turning on the system first time in the morning or after it has been off for maybe hours (tv and cable box) they get one of the following. a) no audio b) no video c) green screen. Other more common symptoms are a flash of green (lime green in all cases) between channel changes, flashing diagonal green and purple line lines (or just one of those colors), a loss audio between channels changes, very slow channel changes and more.
By changing the 4:3 over-ride to 480p in the Motorola's or disabling the 480i output in those Cisco boxes (and both Dish and Directv satellite recievers for that matter) that I have been able to access, I have been able to eliminate all of these symptoms.
This is why I seek to access the service menu information for these new boxes as I am getting calls from uverse customers seeking to fix the tv's (multiple brands and models) they own...that are not broken.
the final resolution is a compatability issue (if these adjustments in the box are not available) and is only resolveable by switching to component video cables or getting a different model box.
02-08-2013 10:15:38 PM
I don't "believe" that it causes anomolies I have verified and documented these for years. The primary issue is with those boxes that provide variable output resolutions. Nearly all Motorola boxes give you the options (in the hidden user options menu) to change the output of the non-hd content to Off, Stretch, 480i and 480p.
Again, you are thinking cable box. The U-Verse STBs are not cable boxes, they are IPTV receivers and operate very differently.
The U-Verse STBs do NOT provide variable output resolution. When you set the output resolution in the user menu to a particular setting (for example, 1080i), then ALL channels are output as 1080i, regardless if the channel source stream is 1080i, 720p, or 480i. The STB will resize/convert all of those streams to 1080i before sending it to the TV.
The end result is that none of these picture anomalies that you speak of occur with U-Verse STBs because there is no resolution switching during channel changes, menu operations, etc.
There are other incompatibilities between the U-Verse receivers and some TVs, usually with older VIP12xx series Motorola or IPN4xx Cisco receivers, almost always on HDMI. In these cases, changing the selected output resolution does not help, and the only recourse is switching to component connections. These cases have gotten much fewer and farther between with the latest firmware versions. This problem is nearly eliminated in the 2nd-generation STBs (Motorola VIP22xx and Cisco ISB7xxx).