The reasons could be many in which we listed some of them in our article “ Fix Windows 10 HDMI Problems“.īut if your PC HDMI port is not working, the first thing is you need to check is your GPU card. You may get a “ No Signal …” kind of error on your monitor device, when your PC HDMI port is having a problem. So you connect your HDMI cable from PC to the required HD TV or Smart TV which has a receiving port using a cable. Related : Download or Install or Update NVIDIA HD Audio Drivers for Windows 10 or 8.1 or 7