How do I get my newer Lg tv to work with my slightly older rca blue ray surround sound

Feb 13, 2018
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I’ve looked through all the threads and can’t find anything so, I figured I’d ask. I have a 2016 Lg tv model # 65UH6030 with a rca 2010 model #rtb1023 blue ray surround sound. I can get the speakers to work with dvds but not with the tvs like everyone else but I have the HDMI plugged into Arc port still nothing. I tried the red and white rca jacks still nothing I tried changing the mode on my tv audio out still nothing so if anyone had some advise I’d appreciate it!
 
Feb 13, 2018
3
0
10

Could you send me the link to what I need please? My tv does have the optical digital audio out. But the blue ray player does not.