[Solved] USB C to HDMI Adapter Cable Not Working in 2023

Here, we summarize our USB-C to HDMI Adapter and USB-C to HDMI Cable issues back in 2018 - 2021. Also, collecting the problem still remains in the rest of the related products in the market.

I assume that you are facing one of these issues, you don’t need to try all the solutions; just work your way down the list until you get your problem solved.

There should be two possibles when your display cannot be recognized.

A. Your host device CAN NOT supply video out, which means your USB-C output CAN NOT provide native DisplayPort signals.

B. Your USB-C port can supply video out, however, there must be errors in the entire connection other than the USB-C port. (Host Device -> USB C Adapter -> HDMI Cable -> HDMI Displays)

     Situation A:

For the host device, Samsung Galaxy A02s got USB-C port but it only gets USB 2.0 protocol, which can not transfer video & audio signal through the USB-C port, which does not have DP Alt Mode.

That means, no matter which UBS-C to HDMI Adapter, or USB-C to HDMI Cables you use, you cannot stream things to TV from Samsung Galaxy A02s. 

  Situation B:

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It is 100% sure that all 4 USB-C ports of MacBook Pro 16'' 2021 supply DP Alt Mode, but there is still got chance that you can not use the USB-C to HDMI Adapter normally.

Please confirm your UBS-C port function well, and the HDMI to HDMI cable works properly. If the above all performs well, you should consider changing the adapter.

· Oh, yes, one more tip for MBP users . You have to charge MBP when you want to activate the clamshell mode, before closing your screen.

· And for Windows Users, please make sure you've got the latest driver. (Or you can view the troubleshooting here.)

This often happens when you use the adapter/cable for a while (3-12 months), or immediately appears after you upgrade the system; It most frequently appears with Windows users when upgrading to newest version.  

For Windows users, if your USB-C to HDMI adapter is not working, the issue might be connected to the dedicated driver. So we recommend you update the USB to HDMI driver on the official website. Alternatively, recently installed Windows 10 updates can lead to problems due to random bugs. Well, at last, the problem might also be the hardware itself, which means the adapter itself.

And for the rest non-Win Users, there is still a chance that the system or the CPU causes the problem. However, go and contact your devices manufacturer and the adapter provider will always get an answer.

Well, actually chances of encountering this issue are way more than the rest of the problems. Some people just ignore this. However, there will be two reasons causing this happening.

A. The connection from USB-C to the display has errors. It might be the adapter went down, the HDMI to HDMI cable is not good quality, the HDMI cable length is over 15ft, or the display goes faulty on refreshing rate(even without any other connection), and there is also a slight chance that the host device (USB-C device) is not working well.   B. Other connections affected the display, besides USB-C to HDMI. Maybe the power output of the HDMI display causes unusual surge.   Some people might consider this issue as Compatibility faulty, things like different protocols created by whom. However, I believe the most important thing is you need to figure this issue out, get rid of the flickering. Or upgrade to USB-C monitor and connecting the monitor with USB4 Cable!  

Just confirm directly with the USB-C device manufacturer this professional question.

  📢 Highly recommend you trying uni quality HDMI to HDMI cable / uni USB C to HDMI Cable for directly connection.

Just like the barrel theory. You have to make sure the entire connection meets the requirement if you want to obtain a complete functionality that contains input, output, and connectors.   Please always remember, to check 3 parts of the entire connection if you want to get the full function: 1. The output device supports the standard; 2. The connector/cable supports this standard; 3. Input devices support this standard;   And if you can make sure the entire chain is working perfectly, the last thing should be learning the correct adjustment steps.  

For Mac Users, here is How to Change your Mac display's resolution.

For Win Users, here is How to Change your display refresh rate in Windows.

 What you should do first:
 Google the specific steps according to specific issue.
 

 No sound from tv (Mac)

 No Sound from tv (Win)

 Feels hot to touch (Buy another cable, please)

 Cut Wifi signal (try another cable, or connect this cable directly to the host device)

 Drains battery fast (Most helpful one would be to confirm which cause this issue. And make sure you connect your Power cable! lol)

Hopefully you’ll find this post useful.

  Please feel free to leave a comment below if you have any ideas or questions. Thanks for reading!