https://forums.lenovo.com/topic/findpost/2251/4494716/4503683 . Hello, I am really impressed with the in-depth selection of components for a proper C530 upgrade.
You should open a ticket if you haven't. I'm never buying Lenovo again. I can't leave the USB-C cable connected to the monitor ready for my laptop when I come home because there is no HDMI/DP sound on my permanently connected PC. Lenovo claim this is normal!