Sonos beam gen 2 as PC Speaker (windows)

Or HDMI port on Sonos beam gen 2 has problem.

Are you sure you’ve configured your pc to send a signal to that HDMI port? Or to the optical port?

What signal does the Sonos app report that it’s receiving?

Have you spoken with Sonos support to see if they have any suggestions?

Or your PC does not do HDMI-ARC and neither does the TV (or HDMI-CEC wasn’t turned on)?

I changed to use through optical base on mainboard, but no heard sound. :(

I’ll ask you again: 

What signal does the Sonos app report that it’s receiving?

Have you spoken with Sonos support to see if they have any suggestions?

• Yes, if I play with airplay it ok.
• No, I haven't spoken with Sonos support before. But I will try to contact them to ask about this

Still no answer to what does the app report it is playing? (When it is not working over optical).

• I don't understand the app report what does this mean, I try to see it all in the app but don’t see any log or report, Can you support or guide me? Thanks.
• Yes, I spoken with Sonos support before, but they told me: “While there may be a possibility to get audio via a computer with a Beam, we can not guarantee it or troubleshoot it as it was designed for TV audio, not PC audio., We can't exactly advise regarding a computer connection to the Beam as it was not designed to work with computers.”

In the Home Screen for your room containing the Beam, it will show the format of the video signal - DD5.1, DD2.0, etc. This will indicate whether the pc is sending any data to your Beam. What does it show? 
 

Also, to check: Do you get a video image using the pc optical connection? What if you plug the lead into your tv, so the pc sound and picture should play through the tv? 

If I'm not wrong try to check if your motherboard has Realtek hardware, which has no license for using driver for optical out. You need external usb card, if you use optical out from Asus motherboard, Realtek driver is to blame.