Hello,
I recently set up my X5 64. Everything is good except for this issue. I am getting no Sound when my resolution is set to 3840x2160. I am hoping someone can help.
If I select the Auto Switch to best select resolution, the system sets the resolution to 1920x1080p 59.9hz and the sound is working. I tried switching to another HDMI port but no change.
Here is my setup:
TV: Vizio M658-G1, 4k 120hz refresh rate
Audio: optical digital cable to Bose 550 sound bar
I have most the current firmware update.
Thanks for your time.