Fix USB C to DisplayPort not Working / No Signal

Today, we’ll show you how to fix USB-C to DisplayPort not working.

USB-C to DisplayPort adapters only work if your port supports video output. Look for a lightning or “D” symbol to confirm. If there’s no symbol, the port is likely for charging or data only.

Some users also report “no signal” errors with USB-C to DisplayPort cables, meaning the monitor isn’t receiving the signal. Here’s how you fix it.

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

1. Use specialized software to detect graphics card issues

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 PC HelpSoft Driver Updater is driver updater software that scans for outdated and missing drivers and enables users to quickly update them.

Although you can manually update drivers, this tool will quickly tell you what drivers need updating. Its extensive driver database and lighting quick scans make it a good choice for updating drivers.

⇒ Get PC HelpSoft Driver Updater

First, some users might need to reconnect their monitors with HDMI ports so they have working VDUs. When you’ve installed and launched the application, it will automatically scan drivers. Select to update the graphics card driver.

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.

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.

3. 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.

4. Adjust the refresh rate settings in Windows

1. 1. Click Settings on the Start menu

2. 2. Then select System and Display in Settings to open the tab directly below

   

3. 3. Click on Advanced display settings to open the properties windo

   

4. 4. Then press on the Monitor tab.

5. 5. Select an alternative refresh rate on the Screen refresh rate drop-down men

6. 6. Click the Apply button, and select the OK option.

   

If you can do so, try adjusting refresh rate settings via Windows Settings. This should fix the USB C to display port not working issue in no time, if the other solutions failed to do so.

5. Check if your PC supports DisplayPort Alternate Mode

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.

These steps should help you resolve the USB-C to DisplayPort no signal issue. If the error persists, there may be a hardware problem with the monitor, and you may need to check for repair or warranty options.

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

For further assistance with USB issues, you can explore our articles on fixing USB not working in Windows 10, Windows 11 not recognizing USB devices, and USB stops working on TV.

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.