The "301, 309 channels n AOD 9xx channels" are ALL SD Channels.

The first thing is to check if got loose cable or if this happened after you changed cables which were now connected wrongly. Then try to switch off the Byond power completely (not standby), wait a few minutes and switch power back on and don't touch anything until the time appears on the Byond display in standby, then check the channels again. If this did not fix your audio problem, then continue reading.

Is it Byond (also for Byond PVR) box and did you also subscribe to HD Service (or Superpack) ?

If all yes... did you change the Byond/Byond PVR Digital Audio Output Settings ?

Digital Audio Output have these 2 settings...
(1) Stereo (Analogue and Digital)
(2) Dolby Digital 5.1 (Digital only)

When HDMI connection used...
Both (1) and (2) got "sound" for all SD and HD channels. No problem.

When RCA (red, white) connection used...
For (1), got "sound" for all SD and HD channels.
For (2), NO "sound" for ALL HD CHANNELS ! Only all SD channels got "sound".

You did not give enough details so I am guessing that maybe you have changed to the "wrong Byond audio output settings".

Did you connect 1 Byond to 2 HDTVs. First TV by HDMI cable connection... and Second TV by RCA (red, white) cable connection. If this is your situation... when setting (1) is used... and when you watch any * HD channel, your First TV will have "sound" BUT your Second TV will be "soundless" as you described.

* Correction... wrongly typed "SD"

Also, did you connect Byond box to AVR Amplifier and then from Amplifier to HDTV ?

I think I have previously explained this here before including some other info.

IF all SD and HD channels got no "sound" for ALL cable connections, not cable loose and not wrong cable connections, then I guess your Byond box may have some problem. If everything done and still cannot fix it, then I suggest you phone to Astro Customer Support for help and the support person "may probably" send someone to come to your place to check.



ADDITION: Correction
Mmm... my mistake that I did not read carefully your explanation. I realised that you have "soundless" problem with the few SD channels you mentioned so my above answers on the Byond Audio settings WILL NOT FIX your problem because my answer is for the audio from HD channels.

If signal reception problem, both video and audio will have problem, not just the audio only.

Did you connect the Byond HDMI Out directly to your HDTV ?

When Byond Digital Audio Output is set to "Stereo (Analogue and Digital)", it will HDMI output all SD and HD channels in only PCM Stereo which all HDTV can decode so got sound.

When Byond Digital Audio Output is set to "Dolby Digital 5,1 (Digital Only)", it will HDMI output all SD channels as PCM Stereo... and all HD channels as Dolby Digital 5.1/2.0.

If your HDTV do NOT have built-in Dolby Digital Decoder... when the Byond is set to "Dolby Digital 5,1 (Digital Only)", the HDTV will have NO sound eventhough you connect directly by HDMI to your HDTV. So make sure your HDTV support Dolby Digital decoding. IF not, then of course no sound for all HD channels !

Here's a picture I took with my phone camera of my Samsung HDTV...


Most old and new AVR Amplifiers already support Dolby Digital audio decoding so connecting the Byond HDMI to the amplifier (if have HDMI Input) will correctly allow sound from the HD channels with Dolby Digital audio. If you are already using this connection, then maybe something is wrong with your Byond box. Of course getting 5.1 surround from home theatre system for the HD channels Dolby Digital 5.1 is a lot better than the HDTV internal stereo speakers.

You also mentioned that you got "some jiggling" in the picture and then no sound. I suspect that there may be 2 possible reasons.

Possible Reason 1
Maybe the HDMI contact pins in either end of the cable heads is poorly connected or loose. Loose connections can cause intereference or loss of video or audio.

Possible Reason 2
Even if the reception signal is strong from the LNB at dish, please check from your Byond whether the signal reception fluctuates sometimes from excellent to poor. This was what happened with a friend of mine who installed the dish on the first floor. He complained that his LED TV picture will always flicker a few seconds after about every half an hour and picture colour is weak eventhough the reception signal is still strong, so I asked my Astro installer friend to personally go to his house to check. Hehe... he found out that the dish angle of direction was pointing to a very tall tree with one tree branch that is blocking a part of the signal path. My friend just saw off this annoying long horizontal branch and no more flickering and picture colour and sharpness is now excellent ! It seems that the single long tree branch is always swaying from the wind and blocking part of the signal area, LOL. Sometimes its difficult to find out the reason which may be due to such "blocks".

Possible Reason 3
Probably your "jiggling in graphic n then no sound" can also be caused by loose cable connection at the LNB (at sat Dish) or at your Byond Satellite Input.
Also check if your Byond Satellite Input cable is properly connected tightly. Its difficult to check the LNB for loose cable connection if located at rooftop.

Even if the LNB is correctly aligned at the dish, sometimes the cable connected to the LNB may be getting slightly loose which can cause very funny problems with the TV channels.

Everything I suggested here are only my guesses of your actual situation. I believe the best way is to call someone who is very good in Audio/Video/HiFi to personally come to your home to check everything, including your HDMI cables and various connections.