Duplicate Display function stopped working

[Orpflog50]

My duplicate/extend/2nd display functions have stopped working. Before answering, know that I have:

-rebooted

-tried six different HDMI and USB to HDMI cables

-tried multiple 2nd screen tvs and monitors

-updated drivers, and deleted and reinstalled drivers (all are up to date)

-run HP diagnostics

-dusted the ports

-checked for updates

-read all of the forums on here about display problems (apparently, multiple people have this issue)

-held my mouth right

-said a prayer

-used witching rods

... none of which have worked. Not long ago, all I had to do was plug in the HDMI and the duplicate monitor automatically started without pressing function/F4. Now, the duplicate display remains undetected and will not register. If you have any new solutions besides what I have already done, I am all ears. Thank you

[A_Gayathri]

Hi @Orpflog50,

Welcome to The HP Support Community.  

Thank you for posting your query, I will be glad to help you.

I understand you’ve already tried a comprehensive list of troubleshooting steps for your duplicate display issue. 

Here are a few more advanced troubleshooting steps you can try:

 

1. Check Display Settings:

• Right-click on the desktop and select Display settings.
• Click on Detect to see if Windows can find the second monitor.
• Ensure that the Multiple displays drop-down is set to Duplicate or Extend.

2. Check Graphics Settings:

• Right-click on the desktop and open Graphics Properties or NVIDIA Control Panel (if you have an NVIDIA GPU).
• Ensure that the display settings for multiple monitors are configured correctly.

3. Rollback or Reinstall GPU Drivers:

• Sometimes the latest drivers can cause issues. Go to Device Manager, right-click on your graphics adapter under Display adapters, and select Properties.
• Go to the Driver tab and click Roll Back Driver if the option is available.
• Alternatively, uninstall the driver and then reinstall it from the manufacturer's website.

4. Check Display Port Configuration in BIOS:

• Sometimes settings in BIOS can affect how the display ports work. Restart your laptop and enter BIOS (usually by pressing F2, F10, or DEL during startup).
• Check if there are any settings related to the display or video output that might be disabled.

5. Run Windows Troubleshooter:

• Go to Settings > System > Troubleshoot > Other troubleshooters.
• Run the Hardware and Devices troubleshooter to see if it detects any issues.

6. Update BIOS:

• Check if there’s a BIOS update available for your laptop model on the HP support website. An outdated BIOS can sometimes cause display issues.

7. Check for Windows Updates:

• Go to Settings > Update & Security > Windows Update and ensure that your system is fully updated.

8.  Inspect HDMI/USB Ports and Cables:

• Ensure that the HDMI and USB ports and cables are free from debris and not damaged. Sometimes subtle issues with connections can cause detection problems.

9. Factory Reset as a Last Resort:

• If all else fails and you’re sure it’s not a hardware problem, you might consider backing up your data and performing a factory reset to rule out any software issues.

Refer to this document:  HP Pavilion 15.6 inch Gaming Laptop PC 15-ec2000 User manual

I hope this helps. 

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution.