TV keeps losing soundbar and reverting to TV speakers

[MisterLeroy]

Hey. I have this TV -  QE85Q95TATXXU - out of warranty now of course..

I also have a Q900T soundbar.

The TV keeps reverting to TV speakers.. never used to do it. Can't say when it started doing this.

I've a ps5 in the game port. The soundbar in the eArc port. 

I've high grade high speed certified HDMI cables for both. 

When the TV turns on now it takes a few minutes to even see a soundbar, usualy only through WiFi. After some waiting it sometimes sees it through eArc. Sometimes. I power cycle until it finds it. 

What's the fix for this? It's driving me insane

[MisterLeroy · Accepted solution]

The only update I can share for my specific issue is that it is in fact solved.

The OneConnect box required a brand new main board and now it works fine.