Solved! 55in Phillips smart TV and LG soundbar

Which Philips smart TV model is it exactly? Should be labeled on the back or in the menu of the TV (system informations tab)

Depending on which outputs the TV delivers, if the HDMI is ARC compatible, you can use something like this:
https://www.amazon.com/Easycel-Mult...&qid=1550145918&s=gateway&sr=8-11-spons&psc=1

If the TV only provides common HDMI ports, these would be only inputs and you won´t be able to get the soundbar on that to work.
 
Solution