Is this an AMD/Intel hybrid rig?
If so try the drivers from Lenovo for both GPUs
This message was posted on behalf of Intel Corporation
In that case, I strongly recommend contacting Lenovo and see if they have a set up in the BIOS or different configuration that might be required, other than that, most likely it will be a defective HDMI port.
You can get support here:
NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.