Help needed!

Hi everyone,

I just bought a beolab 2 subwoofer what i wanted to add to my Beolab 8000 speakers that i have had for years. I only use my speakers as TV speakers and my setup looks like this: LG C1 Oled TV - connected via mini jack headphone out to RCA/Phone into - ESSENCE MK1 - connected via PL to Beolab2 - connected via pl to Beolab 8000

The beolab 8000 would would work perfectly a start everytime my TV send audio with a satisfying click sound. Now if my TV starts sending audio it will still turn on the speakers, they will run for 10-40 seconds, then without a click (but rather a short"bzzz" sound) they turn off and all light on the speakers turn read. Since the subwoofer is controling the BL8000 whey also turn of, and I am left with no sound. I can only make the system reset by removing power to the Subwoofer. Does anybody have a fix for this? I have tried everything without any succes, and the duration the Beolab 2 stays on seems to be shorter and shorter.

Hope you guys can help as I am running out of ideas. Thanks in advance for all input and ideas.A little suspicion: The power cable that goes to the Beolab 2 is not original (could this be an issue??)