How can I connect this audio system to my PC?

[Exilarius]

Hello,
I've been wondering it's possible to connect this audio system (images below) to my PC so I can get surround sound, I hope this is the right section.
It's a VERY old Sony STR-KSL 600, it works great and I've been using it on my PS3 but now I want to use it on my PC.

Here's the back of the SONY STR-KSL 600:
http/i.imgur.com/zt1nFeV.jpg

Here are images of the back of my monitor(LG 23EA63) :

http/i.imgur.com/DlGaBvp.jpg

and the back/front of my PC:
Front: http/i.imgur.com/qwNCPdF.jpg
Back: http/i.imgur.com/gBWlxh2.jpg
AND ( lower Back)
http/i.imgur.com/voiG2av.jpg (mini HDMI and DVI if you can't see it clearly on the second image)

Thanks in advance for all the help, I'm a complete noob at this .

 

[mickypheonix]

Hi Exilarius
do you have speakers plugged into the rear onboard audio , if you do then get a 3.5mm stereo splitter like this

so you can still plug in and use your pc speakers , then from the other 3.5mm socket
a 3.5mm male to dual RCA like this

and the dual rca ends to the audio in on the sony SONY STR-KSL 600

 

[clarkjd]

Are you using a dedicated sound card in yur PC? or are you using the onboard audio?

 

[Exilarius]

Are you using a dedicated sound card in yur PC? or are you using the onboard audio?

I'm pretty sure it's the onboard audio, the only card I have below is the Graphics Card

 

[mickypheonix]

Hi Exilarius
do you have speakers plugged into the rear onboard audio , if you do then get a 3.5mm stereo splitter like this

so you can still plug in and use your pc speakers , then from the other 3.5mm socket
a 3.5mm male to dual RCA like this

and the dual rca ends to the audio in on the sony SONY STR-KSL 600

 

[Exilarius]

Hi Exilarius
do you have speakers plugged into the rear onboard audio , if you do then get a 3.5mm stereo splitter like this

so you can still plug in and use your pc speakers , then from the other 3.5mm socket
a 3.5mm male to dual RCA like this

and the dual rca ends to the audio in on the sony SONY STR-KSL 600

Hey mickypheonix,

This might work , yes I do have speakers and your solution does make sense.
Thank you very much !

 

[mickypheonix]

yes this will work
you are most welcome , hope it all goes well for you , all the best