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i. There is no supply of video output signal from the host device. This may mean that your USB C port output is not able to give native DisplayPort Signal.
The Dell 7-in-1 USB-C Multiport Adapter is a compact and portable multiport 7-in-1 adapter that can connect to just about any device you have. Its downstream USB-C port supports power pass through and is ideal when your laptop does not have any more USB-C charging ports. In this post, we will explain the causes of the problem of USB C to HDMI not working when you attempt to connect them together. However, sometimes the issue might be because of the USB portthat you are connecting with the HDMI adapter. Thus, it is suggested to use any other USB port on your laptop or PC. If you are connecting the USB port with an HDMI hub then you must try changing that too as there might be a problem with the hardware as well. Therefore, it is recommended to update the USB-HDMI driver. There are various applications and programs you can use to update the drivers. Reasons For USB-C To HDMI Not Working
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Select “Repair All”, this will fix all of the problems causing problems with USB-C to HDMI connection. Some users need to replace their HDMI adapters so that they can work properly. Similarly, these solutions are used for solving USB-C to HDMI not working. If the adapter of your HDMI is still in warranty, then you can replace it or send it to the manufacturers for repair. And if you want to try it on your own then there are PC recovery tools that can help in troubleshooting the problem.
Essentially, it's a tiny, super-fast connector that many of the best laptops today have a connector for, with the only downside being that USB A or USB B connectors can't be used with a USB Type-C port (that's where a USB Type-C hub comes in handy).Make sure that the host device protocol you are sending the signal from has the ability for DisplayPort ALT Mode. If it does not have, you may not be able to send Audio /Video output through the port irrespective of the USB C to HDMI adapter quality used. As soon as the driver gets updated, if the driver update was the issue, USB C to HDMI connection will start working immediately. Still, for Windows laptops, MacBook, and Chromebook users who only need a couple of reliable ports, this makes it onto our list of best USB-C hubs. Thus USB-C to HDMI not functioning is not a big issue. This issue can be solved easily by following the proper steps.