FIX: USB C to DisplayPort cable not working / no signal

by Matthew Adams
Matthew Adams
Matthew Adams
Windows & Software Expert
Matthew is a freelancer who has produced a variety of articles on various topics related to technology. His main focus is the Windows OS and all the things... read more
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  • Some users who connect their PCs to monitors with USB C to DisplayPort cables need to fix a no signal error. 
  • This guide includes some potential resolutions for the USB C to DisplayPort with no signal error.
  • You can have a browse through a wide variety of hardware and software troubleshooting articles at our Fix hub
  • Our Peripherals page includes many more troubleshooting guides for external peripherals. 
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The DisplayPort is an alternative monitor port to HDMI that users can connect with USB C to DisplayPort cables.

Users with dual monitor setups utilize the DisplayPort interface for their second monitors. Some users also connect laptops to external displays with USB C to DisplayPort cables.

However, some users have posted on forums about a USB C to DisplayPort with no signal. When that issue arises, connected DisplayPort monitors don’t display anything except a no signal message.

How can I fix a USB C to DisplayPort with no signal error?

1. Run a driver scan with DriverFix

DriverFix automatically updates drivers usb c to displayport cable not working

The USB C to DisplayPort no signal error can be a graphics card issue, which DriverFix can potentially resolve. DriverFix is driver updater software that scans for outdated and missing drivers and enables users to quickly update them.

Although you can manually update drivers, DriverFix will quickly tell you what drivers need updating. The DriverFix Pro version also automatically downloads and installs them. Its extensive driver database and lighting quick scans make it a good choice for updating drivers.

First, some users might need to reconnect their monitors with HDMI ports so they have working VDUs. When you’ve installed and launched DriverFix, it will automatically scan drivers. Select to update the graphics card driver. Then you can select an Automatically Install option in DriverFix Pro.

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2. Check if the cable is loose

It might be the case that your USB C to DisplayPort cable is loose. So, make sure your connector cable is correctly plugged into the DisplayPort port and USB C slot.

3. Check the DisplayPort cable’s condition

When a no signal error arises on DisplayPort monitors, there might be an issue with your USB C to DisplayPort cable.

So, carefully check the overall condition of the cable. If the cable isn’t in entirely good condition, you might need a replacement one.

4. Unplug the PC and Monitor to reconnect them

  1. First, power off your PC.
  2. Unplug the PC’s mains plug.
  3. Then unplug the monitor the no signal issue arises on (and completely disconnect its USB C to DisplayPort cable).
  4. Wait for about five minutes.
  5. First, reconnect the monitor to the PC with the USB C to the DisplayPort cable.
  6. Plug the VDU back in.
  7. Plug your PC back in.
  8. Turn your PC on.

5. Adjust the refresh rate settings in Windows

  1. If you can do so, try adjusting the refresh rate settings in Windows by clicking Settings on the Start menu.
  2. Then click System and Display in Settings to open the tab directly below.
    Display tab usb c to displayport cable not working
  3. Click Advanced display settings to open a properties window.
  4. Then select the Monitor tab in the shot directly below.
    Monitor tab usb c to displayport cable not working
  5. Select an alternative refresh rate on the Screen refresh rate drop-down menu.
  6. Click the Apply button, and select the OK option.

6. Check if your PC supports DisplayPort Alternate Mode

Laptop ports usb c to displayport cable not working

Not all PCs have USB C ports that support DisplayPort Alternate Mode. DP Alt Mode is a USB C feature that enables users to directly connect DisplayPort VDUs to their PCs.

So, have a look through your PC’s manual or webpage to check if its USB C slot supports DP Alt Mode. If your USB C slot doesn’t support DisplayPort Alternate Mode, you’ll need a USB C to DisplayPort adapter for monitors to resolve the no signal issue.

Those are some of the more likely fixes for resolving the USB C to DisplayPort no signal error.

If none of the above fixes resolve the error, there might be a hardware issue with the monitor. You might be able to return your VDU to its manufacturer for repairs if it’s still within its warranty period.

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