yes i did set it to db5.1 but it didnt work.
btw i had tried to use rg59u rca cable (labelled as for video) from Ace Hardware but it failed to produce any sound too.

pls help. tx.

                                                     If you play a source encoded with a DTS signal and set
                                                     the input mode to ANALOG, this unit may reproduce
                                                     the noise of an unprocessed DTS signal. In this case,
                                                     connect the source to a digital input jack and set the input mode to AUTO or DTS.

frm what i understand, only by using coaxial u will get true digital 5.1 surround

im not sure what u mean by true 5.1 surround. for me nor sd channel i can hear from my rear speaker even for tv3suku.  using prologic II from my avr (pioneer vsx 1019) for hd channel it will auto switch to Digital which have full 5.1(sub+center and rear).

Did you remember to change the input to MD/CD-R? Because that's where the digital signal input is going to play in.
fuad

i have a question.. why sometimes the HD channels will be full screen and sometimes it would be 4:3 ??

maybe the sources itself..
not all sources on HD channels are in HD and 16:9, especially for History HD..
sometimes they just upscale it and if they stretched the 4:3 videos, it will become more worse....

Is the issue with remote fixed?
Turning off will sometimes goes to Channel 1 on TV.

I suspect its software / firmware issue. Not the remote i guess , i maybe wrong ..just a guess.

I have the similar issue everytime i shut and turn on the next day. Also i noticed the press once it doesnt work, once shut , the channel turns on automatically.

The remote seems to be a little sensitive with the hard touch. Must handle softly like a baby i guess..

just to share with regards to 3D:

Samsung issues 3D TV warning

Television viewers will soon be able to watch sport and films in 3D format, but a stark safety warning issued by the world’s largest TV maker may turn some would-be buyers from the technology.

Samsung Electronics said in a long safety guideline on its website that viewers of 3D TV could suffer epileptic seizures and strokes.

It also said sleep deprivation or consumption of alcohol while watching 3D programmes could be unsafe. The South Korean company said on its Australian website pregnant women and the elderly should avoid the 3D function, and children and teenagers were more susceptible to health risks.

http://www.thenational.ae/apps/pbcs.dll/ar.../704159923/1133

Yes, it's normal. Astro has lowering volume level for HD channel, or maybe SD channel too.
Previously, HD channel is louder than SD, then they normalize it.
Now i felt they lowering a bit more because now normal volume level for my ears is 25, previously 20/21. Or something wrong with my ears 
Above explanation is for HDMI connection only. Note that you can't change volume level for digital signal, that's why you need to change volume at your TV.
Signal Quality doesn't affect volume level.

If using HDMI use your TV remote to control your AVR .DONT use Beyond remote to control the TV its very irritating it cannot do a perfect job xcept to control the beyond box.   It usually goes to TV channel one each time you turn off your TV!!! NGC is loud and give a cinematic experience cos its ORIGINAL 5.1, its always full screen not like the rest

erk..whats AVR?took me awhile to get what NGC is..spare me the headache please..