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What is your TV model?
I have seen this issue happening because the monitor has a HDMI input setting, which can set the input HDMI port works at 1.4 or 2.0. But the default is 1.4, try to set it to 2.0, that will make it work at 60Hz.
I hope this can help.
Thanks for your reply. The TV is a Bolva 40BL00H7-01. I confirmed with the manufacturer that it does indeed support a 60Hz refresh rate at 3840 x 2160. As you suggested, I looked through the menus for some mechanism to modify the HDMI compatibility setting. I didn't find a 1.4 / 2.0 switch; but, I did see a 4K HDMI setting that could be changed from "Standard" to "Enhanced", presumable for all 4 HDMI ports. I tried that, powered everything down and back up without any luck. Any other thoughts? Thanks again.
Can you let us know what is the model of the computer? The reason why I'm asking is because 3840x2160@60hz requires the HDMI output to be HDMI 2.0
If the HDMI output is version 1.4 it will be limited to 3840x2160@30hz since it doesn't have the bandwidth to carry 4K@60hz signals.
Just to clarify, the Intel HD Graphics 530 does support 4K@60hz, but it has to be done through HDMI 2.0 or DP 1.2 outputs, and ports availability depend on the motherboard/computer manufacturer.
Ronald, that is indeed the problem. I spent a couple of hours reading and talking to the maker of my PC last evening and confirmed that my motherboard/on-board chip set are limited to HDMI 1.4. Earlier this morning, I ordered a GEFORCE® GTX 1050 2G OC graphics card to work around the problem. That's not the solution I was looking for; but, it's likely the least expensive solution.
Thanks for your help.