Here Are the Fixes! There may be connection error even though the USB C port can supply video out signal. Right click your display adapter andselect Updatedriver. Launch the device manager after right-clicking on the Windows icon. Plug the USB device into a different USB port on your PC. For example, this is a screenshot of Windows 10 Pro. ). How do I determine the manufacturer of my display adapter (graphics card)? The easy way to figure it out is by connecting it to various USB-C compatible devices and seeing if they are powering up or getting detected. Did you make any changes to the computer prior to the issue? Youd better remove the adapter from your computer while performing a reboot. Thus USB-C to HDMI not functioning is not a big issue. If this is not the case, the adapter needs to be changed. Steps to change the default display adapter vary by device, so contact the manufacturerfor more information. As we mentioned before, there are a lot of adapters out there and each works differently for different users. Find solutions to common problems or get help from a support agent. There have been reports from users of adapters working on one port but not the other. . Regards. The opinions expressed above are the personal opinions of the authors, not of HP. Make sure the cable connecting your PC to your external monitor is secure. USB to HDMI adapter is not working on Windows 10! 3. If so, move on to the fix below; otherwise you should connect your adapter to another port. If the adapter of your HDMI is still in warranty, then you can replace it or send it to the manufacturers for repair. That said, check the following: The solution to this is simple. Powered by, How To Check If My Phone Supports HDMI Alt Mode, MacBook Pro USB C Ports Not Working? Typical ports are HDMI, VGA, DVI, and DisplayPort. This applies to all kinds of USB types like Type-C, USB-A, Micro USB. Adapter USB-C to HDMI doesn't work - it show's monitor as US - HP The HDMI should already be connected to an external display. If none of them are not working, then the port is damaged. Right-click your display adapter and select Properties and theDriver tab, and then select Roll Back Driver. USB is the universal connectivity option for. First,you need to make sure your USB-C device is all up to date (get the latest drivers). The problem might also be the hardware itself, which means the adapter itself. The USB C to HDMI not working issue can be caused by incorrect or incompatible device drivers. Thanks for reading! However, there's a fix, and it's as simple as applying a driver . Select Browse my computer for driver software. Windows.