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Audio issues are known problems with 7216 STB's. Te last update, 1.6.2 was reported to have fix them but there are still reports such as yours they are still occuring. The only fix is to switch to a 6416 STB but be advised in doing so you will loose a slight bit of sharpness on SD channels.
We have the HMDVR 6416-2 and have the same spotty audi drop. It happens on all channels (both HD and non-HD) and each time lasts about 1 second while the picture continues as it should.
We've had the box replaced and all connects tested. It's a mystery.
Well since you have two boxes and you dont have the issue with the other one, that pretty much eliminates an issue with the broadcast. Leaving us with several possiblilties....
Could be the box (but since it was replaced and still having same problem not likely)
Samsung TV's and Motorola STB's do have an issue with HDMI...but normally this affects video and audio and usually presents itself with a different set of symptoms
Could simply be a bad HDMI cable (have you had it replaced?)
Could be a connection issue on the HDMI connection on the TV ( I know...not likely but still a possibility) If you have a second HDMI input on the tv, try swapping inputs
Could be a bad splitter (main splitter, not the one that was added) or coax run from the splitter to this room.
Could be a bad coax connector on either the splitter end or STB end.
These are generally the most likely causes
Turns out my TV is most likely to blame. Samsung has a Firmware upgrade available for my TV and one of the corrections on the firemware is "Intermittent audio drop out". So hopefully this will solve my problem. Below is link in case anyone else with this TV is having this problem.
I am having this issue also and I think it is the Motorola HD DVR QIP 72161 Set Top Box.
Here are my reasons why:
1) My home theater setup was fine with Cox Cables Scientific Atlanta STB on HDMI cables
2) Verizon had to set this up with HDMI for video and Optical cables for audio - clearly a j-rig just to avoid a "green sceen of death"
3) various "green screen" issues with many different vendor's equipment
It appears to be an hdmi handshake issue with th motorola 72161 box. I am now regretting my decision to get fios about a month ago. I will probably go back to Cox after my year is up. Maybe an non dvr motorola will make things somewhat tolerable in the interim.
Anyone have any suggestions?