Only F/L Speaker working...

stormy13 said:

You install the Realtek driver,

Latest Realtek HD Audio Driver Version

for your onboard sound?

Yes I have.

stormy13 said:

Set to stereo/2.0/2.1 in both the Realtek controls and the Windows speaker configuration?

No, it's set to 5.1.

stormy13 said:

Then that would be why you are only getting sound from one side, it needs to be set to stereo/2.0. You may be connecting to a surround system, but you are only using a stereo connection.

Which cable do I need for my 5 speakers?

I changed the settings , alas, no change.

Strange thing happened. When I went to DTS and enabled it my centre speaker started to work.
When I test my speaker both in realtek and windows the centre speaker thinks it's my F/R, also the F/L has stopped working. lol

I think it's analogue.
Have a look!!

Do you have a set of headphones or other two speaker system that you can test the output with?

If you do insert the jack into the green socket and check that the sound appears in both left and right channel

If this is correct then you may have an issue outside of the computer - either the cabe or decoder.

also check that surround is switched off in the options for the realtek CP