Not all USB-C ports support video output. You should check the specifications on your particular model.

Only USB-C port with USB 3.1 or above version can stream video.

Answer from Craig Long on learn.microsoft.com
🌐
Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 4291173 › usb-c-to-hdmi-adapter-doesn-t-work
USB-c to hdmi adapter doesn’t work - Microsoft Q&A
Top answer
1 of 5
25

Not all USB-C ports support video output. You should check the specifications on your particular model.

Only USB-C port with USB 3.1 or above version can stream video.

2 of 5
2

Hi Lucy. I'm Greg here to help.

I see a lot of reported issues with USB-C to HDMI adapters, in fact any adapters for monitors in Windows are very likely not to work for many reasons because the native method is always much, much better.

But you can troubleshoot USB-C to HDMI monitor connections not working to see if one of these fixes work - I've collected them all:

https://sortatechy.com/usb-c-cable-with-monitor/

https://www.partitionwizard.com/partitionmanage...

https://usbcafe.com/usb-c-to-hdmi-not-working-s...

https://uniaccessories.com/blogs/blog/solved-us...

https://www.youtube.com/watch?v=7IRLYIXz2TA

Feel free to ask back any questions. If you'll post back detailed results then I may know what to suggest next, if necessary.

______________________________________________

Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.

🌐
Reddit
reddit.com › r/usbchardware › usb-c to hdmi suddenly stopped working
r/UsbCHardware on Reddit: USB-C to HDMI suddenly stopped working
September 24, 2023 -

I have been using an HDMI cable + HDMI to USB-C adapter to connect two monitors to my laptop. My main monitor is directly plugged in to the HDMI-socket, and the USB-C adapter to the only USB-C socket on the laptop. It's been working flawlessly until yesterday. Now the second monitor just displays "No HDMI signal" and goes to sleep mode. It does not even recognize me plugging in the USB-C cable. Take note that I've done zero (0, nil, no) changes to my setup.

Naturally I thought that the adapter was faulty since I did some testing with the USB-C socket (it charged my iPhone), and the HDMI-cable was working. Purchased a new HDMI to USB-C cable but to no avail.

On my laptop the device manager shows my monitor as a "BillBoard Service".

Has anyone run into this problem? Google is not my friend in this matter, even though I am a man of lurking the internet. Can someone point me in the right direction here?

Many thanks.

Edit: Okay so it got solved by turing the laptop off, then holding the on button for 30 seconds and letting go. What this triggered I have no idea but it might help someone out.

Top answer
1 of 5
1
This is the first post I've found with this problem! I have the same set-up; a Dell laptop with HDMI port and two USB-C ports. HDMI port connects to an external monitor, one USB-C connects to a power supply, the other to an external monitor with a USB-C to HDMI cable. The USB-C ports are interchangeable as to function. This works fine most of the time, but sometimes when I boot it, the USB-C-connected monitor doesn't get a signal. "Display Settings" shows all 3 displays, but the misbehaving one is shown smaller, and listed as "Disconnect this display". Changing the dropdown box doesn't work. It won't change from "Disconnect this display". This only seems to happen at boot time. I've switched monitors, switched USB-C ports, even bought a USB-C to DisplayPort cable, but the issue pops up randomly anyway, so I'm pretty sure it is not a hardware problem. Most days it works fine, but some days it just doesn't. This is a work-issued laptop, on which I do NOT have administrator privileges, so updating drivers or mucking with the BIOS is out of the question. Since it isn't reliably reproducible, and I work from home, getting the company's IT department involved would be an exercise in futility. The only ways I've found to fix it are to reboot, or to superstitiously flip the USB-C connector over a time or two. I am a software engineer and electronics technician, so I have some small expertise. I believe the display driver is to blame, but I can't prove anything. I think there's some boot-time sequence that doesn't always go just right. FWIW, my display adapter shows as Intel(R) Iris(R) Xe Graphics, Driver Version 31.0.101.3959. It's very frustrating and annoying when it happens, but I don't have any better solution than this.
2 of 5
1
Dude, I had the exact same problem and I tried your solution and it worked! Thank you so much! Now I’m curious what caused it as well. I know I recently updated my GeForce drivers so maybe after certain updates you have to do a hard reset?
Videos
01:11
🌐 YouTube
How To FIX USB to HDMI adapter not working on Windows 10/11 - YouTube
November 6, 2023
31.6K
🌐 youtube.com
USB C to HDMI Adapter Cable Not Working ? Check This Out ...
01:59
🌐 YouTube
HDMI MHL cable not working with phone QUICK FIX! - YouTube
February 4, 2014
2.37M
05:08
🌐 YouTube
USB C to HDMI Adapter Cable Not Working ? Check This Out: How to ...
December 1, 2022
01:59
🌐 YouTube
Fix USB to HDMI Adapter not Working in Windows 11 - YouTube
December 22, 2021
123K
View all
View all
🌐
Selore
seloreglobal.com › blogs › selore › troubleshooting-usb-c-to-hdmi-adapter-issues-a-comprehensive-guide
Troubleshooting USB C to HDMI Adapter Issues: A Comprehensive Guide – Selore
The USB C or HDMI ports on your device or external display may not function properly due to physical damage, loose connections, or long-time wear. Connect other peripherals to the same ports to see if they work properly.
🌐
Dockteck
dockteck.com › home › troubleshooting usb-c to hdmi adapter: tips for fixing this common issue
Troubleshooting USB-C To HDMI Adapter: Tips for Fixing This Common Iss – Dockteck
The action will restart the connection and eliminate compatibility if any. Sometimes the USB C to HDMI may not work properly because the device cannot recognize the connection properly.
🌐
Cabletime Tech
cabletimetech.com › home › knowledge › knowledge
Troubleshooting USB-C To HDMI Adapter: Tips for Fixing This Common Issue
December 13, 2023 - To narrow down the cause of the problem, try connecting the USB-C HDMI adapter to another compatible device. This procedure allows you to determine whether the problem is in the adapter itself or in a specific device to which you initially connected. If other devices recognize the adapter and work correctly, the problem may be related to the settings or compatibility of the original device.
🌐
Vcom
vcom.com.hk › shows › 169 › 438.html
How to Solve USB C to HDMI Adapter/Docking Not Working - Blog - - VCOM International Ltd
This article provides a comprehensive guide to troubleshooting common problems associated with USB-C to HDMI adapters and docking stations, offering practical solutions to ensure smooth connectivity. ... Not all USB-C ports support video output. DP Alt Mode (DisplayPort Alternate Mode) is required for transmitting video signals through USB-C.
🌐
HP Support
h30434.www3.hp.com › t5 › Desktop-Video-Display-and-Touch › USB-C-to-HDMI-Isn-t-Working › td-p › 8933207
Solved: USB C to HDMI Isn't Working - HP Support Community - 8933207
December 7, 2023 - I have an HP Pavilion Gaming - TG01-0018 pc and have tried connecting both my drawing tablet and desktop to it because manually switching them out was getting annoying, so I bought a USB C to HDMI adapter. But whenever I try connecting either of the devices to it ... I assume the drawing tablet has an LCD screen and take the place of the monitor. There is probably no log since you are not gaming.
🌐
uni
uniaccessories.com › home › blog
[Solved] USB C to HDMI Adapter Cable Not Working in 2023 - uni
I had bought a 6" USBC TO HDMI ONN cord thinking the gentleman from Walmart knew what he was talking about and I can’t get it to work. I’m trying to watch my phone on my tv. ... Hey Ned, you mentioned the usb c to HDMI works with laptop but not your S9. It seems the usb c to HDMI is just fine, the issue should be S9 connection.
Find elsewhere
🌐
Mokin
mokinglobal.com › home › hub & adapter › [solved] usb c to hdmi adapter cable not working
USB C to HDMI Adapter Cable Not Working - how to fix it
October 27, 2025 - 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 ...
🌐
Mokin
mokinglobal.com › home › mst hub › usb c to hdmi hubs not working -- how to fix?
USB C to HDMI Hubs Not Working -- How to Fix?
October 18, 2024 - Click on “Update & Security” and “Check for updates”. Return to the “Windows Update” section when the update is finished. Click on “View optional updates” and then click “Download & install.” to install any available updates. Once the drivers are installed, restart your device and see if it works well. Most users have reported that their USB C to HDMI connections ceased functioning after the recent Windows 10 update.
🌐
MiniTool Partition Wizard
partitionwizard.com › home › partition manager › top 5 solutions to usb to hdmi adapter not working
5 Easy Solutions for USB to HDMI Adapter Not Working
November 28, 2024 - Step 2: In the Device Manager window, expand the Other Devices option. Then right click on your USB device and select Update Driver. There may be a problem with the USB port used to connect the USB to the HDMI adapter.
🌐
Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 4119805 › usb-c-connector-device-not-working-for-hdmi-extens
USB-C connector device not working for HDMI extension. - Microsoft Q&A
Top answer
1 of 1
1

Hi Mridul karat palliyath,

Welcome to Microsoft Community.

I'm Hahn and I'm here to help you with your concern.

I'm sorry to hear that your USB-C HDMI connector is not working properly. It sounds like you have a driver issue or a hardware compatibility problem. Here are some possible solutions that might help you fix the error:

Fix USB-C problems in Windows - Microsoft Support

Error codes in Device Manager in Windows - Microsoft Support

  1. Update Drivers: Make sure you have the latest drivers installed for your USB-C HDMI connector. Sometimes, compatibility issues can be resolved by updating or reinstalling the device drivers. Visit the manufacturer's website and download the latest drivers for your specific device and operating system.
  2. USB Port: Try using a different USB-C port on your computer. Some USB-C ports might have different capabilities, and using a different port could potentially resolve the issue.
  3. Firmware Update: Some devices, especially USB-C adapters, may require firmware updates to ensure proper functionality. Check if there are any firmware updates available for your USB-C HDMI connector and follow the manufacturer's instructions to update it.
  4. Uninstall and Reinstall Drivers: In the Device Manager, you can try uninstalling the problematic drivers, disconnect the USB-C HDMI connector, restart your computer, and then reconnect the adapter. Windows might automatically reinstall the drivers, potentially resolving any conflicts.
  5. Disconnect Other USB Devices: Disconnect any unnecessary USB devices from your computer. Sometimes, conflicts can arise when multiple USB devices are connected simultaneously.

Remember to back up your important data before making any significant changes to your system. It's also a good idea to test the USB-C HDMI connector on another computer to further isolate the issue and determine whether the problem is specific to your computer.

I hope this helps.  If there is anything not clear, please do not hesitate to let me know.

Your Sincerely

Hahn - MSFT | Microsoft Community Support Specialist

🌐
Plugable
support.plugable.com › usb docking stations › ud-ultcdl
No HDMI signal from USB-C docking station (used to work) - UD-ULTCDL - Plugable Support
March 4, 2019 - Hi there! All of a sudden, I’m having troubles connecting my monitors to my plugable USB-C docking station. I have a HP Spectre Notebook (Win10) and used to connect 2 external moniors (also HP) via HDMI to the docking …
🌐
Windows Report
windowsreport.com › fix › laptop & pc › usb to hdmi adapter not working
How to Fix USB-C to HDMI Not Working Windows 11
May 14, 2025 - As you probably expect, there are several possible causes for this issue, the most common of which include an outdated or missing driver, a faulty cable or adapter, display settings interfering, or graphics card compatibility.
🌐
CableCreation
cablecreation.com › blogs › news › usb-type-c-to-hdmi-cable-0715
What to Do if Your USB Type C to HDMI Cable Disconnects Frequently? – CableCreation
July 19, 2024 - CableCreation cables support up to 4K@30Hz, but some devices or displays may not be able to stably support this resolution. Remove the protective case: When using the phone, temporarily remove the phone case to ensure that the Type-C port is fully seated on the cable. Check for physical damage: Carefully inspect the cable for signs of wear or damage, which may affect the quality of the connection. Q1: Is the USB Type-C to HDMI cable compatible with my monitor?
🌐
USB Cafe
usbcafe.com › usb-c-to-hdmi-not-working-solved
SOLVED: USB-C to HDMI Adapter Cable Not Working (2023) – USB Cafe
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. You will also learn the few simple steps to resolve the issue all by yourself with no step skipped.
🌐
Super User
superuser.com › questions › 1758415 › usb-to-hdmi-via-a-hub-does-not-work
windows - USB to HDMI via a hub does not work - Super User
Top answer
1 of 1
2

DisplayPort Not Supported

Your laptop does not support DisplayPort over USB-C.

On your laptop the USB-C port and the 2 USB-A ports are all USB 3.2 Gen 1 ports that only support data transfer.

You can however connect additional displays that have DisplayLink support to your USB-C and USB-A ports (such as your Asus portable display) or get a DisplayLink USB hub/adapter and connect generic displays that don't have native DisplayLink support.

  • Read more about DisplayLink here
  • example USB hardware with DisplayLink support (hubs, displays, etc.) here
  • See your HP laptop specifications here
  • Read about DisplayPort over USB-C here

HP EliteDisplay E243D DisplayLink

 

USB-A Displaylink Adapter

 

USB-C Displaylink Adapter

🌐
YouTube
youtube.com › watch
Troubleshooting Guide: USB C to HDMI Adapter Cable Not ...
Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
🌐
Plugable
support.plugable.com › thunderbolt › tbt3-udc3
USB c port not recognizing HDMI adapter and therefore monitor - TBT3-UDC3 - Plugable Support
October 20, 2021 - Hi There, Hoping you can help me!! I have the wonderful TBT3-UDC3, however I have had a couple of issues of late … Issue 1 … when I plug in a different laptop, a brand new Lenovo Thinkbook G4 T2 the monitor that is attached to the displayport throws a paddy every 5 seconds, connecting and disconnecting.
🌐
Quora
quora.com › Why-doesnt-my-USB-to-HDMI-cable-work-Does-it-need-a-driver
Why doesn't my USB to HDMI cable work? Does it need a driver? - Quora
Answer: Depends on the adapter. Most USB to HDMI (and all of them with type A connectors) are really USB connected video cards with an HDMI connector. They will need a display driver.