[Solved] USB C to HDMI Adapter Cable Not Working

First,you need to make sure your USB-C port supplies DP Alt Mode or not.
Two possible if your display cannot be recognized.

First,you need to make sure your USB-C device is all up to date (get the latest drivers).

This situation often happens when you use the adapter/cable for a while (3-12 months), or immediately appears after you upgrade the system; When upgrading to Windows 10/11,the situation most frequently appears with Windows users.

For Windows users, if your USB-C to HDMI adapter does not work, the issue maybe connect with dedicated driver.In order to solve this issue,we suggest 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. 

The problem might also be the hardware itself, which means the adapter itself.

You need to try a different cable/hub adapter.

If you have DP port in your external display,you can try a USB-C DisplayPort cable.
As the matter of fact, chances of encountering this issue are more than the rest of the problems. The situation is always ignored by people.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(without any other connection), and there is appear 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 think this issue is Compatibility faulty. But I believe the most significant thing is you need to figure this issue out, get rid of the flickering.

You need to confirm directly with the USB-C device manufacturer this professional question or try uni quality HDMI to HDMI cable/uni USB C to HDMI Cable for directly connection.

If you encounter issues such as: no sound from the TV, the adapter becoming hot to the touch, Wi-Fi signal dropping, or the device battery draining quickly, try the following initial steps.

What You Should Do First:

For precise troubleshooting, we recommend searching online for detailed guides tailored to your specific device and problem. You can use search terms like:

“No sound from TV Mac USB-C HDMI”

“Wi-Fi drops when using USB-C HDMI Windows”

“USB-C adapter overheating fix”

Quick Tips for Common Issues:

• No Sound from TV (Mac): Check the “Sound Output” settings in System Preferences to ensure the TV is selected as the output device.
• No Sound from TV (Windows): Right-click the sound icon in the taskbar, select “Open Sound settings,” and set the TV as the default output device under “Choose your output device.”
• Adapter Gets Hot: This can be normal during operation, but if it becomes excessively hot, try using a higher-quality cable or adapter and ensure proper ventilation.
• Wi-Fi Signal Drops: This may be due to electromagnetic interference. Try using a different USB-C cable or port, or connect the adapter directly to the device if possible.
• Battery Drains Quickly: First, confirm whether the issue is caused by the adapter. Most importantly, ensure your laptop is connected to its power adapter while using the HDMI output, as driving an external display consumes significant power.

We hope this guide helps you resolve the problem effectively.