Wont Dectect 2nd monitor (samsung)

[sfears]

Hi, my desktop will not detect a 2nd monitor. I tired with my work laptop and now have purchased a Samsung monitor and it keeps saying not detected. I have restarted and updated the desktop. I have a brand new HDMI cord and have tried different HDMI slots, nothing is working. Please advise. I need this for work and I am very tech illiterate.  

[Max3Aj]

@sfears, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
Here’s a step-by-step guide to help resolve the issue of your HP Pavilion 31.5" All-in-One Desktop PC (32-b0000i) not detecting a second monitor (Samsung), based on your description:

Confirm the HDMI Port is Output-Capable

Many All-in-One PCs have HDMI-in ports (for using the PC as a monitor) rather than HDMI-out (for connecting a second monitor).

• On your model, the HDMI port is likely HDMI-in, which means it won’t send a signal to an external monitor.

Check your product specs here: HP Pavilion 31.5 inch All-in-One Desktop PC 32-b0000i (3N9R3AV) - Setup and User Guides | HP® Suppor...
Look under I/O Ports to confirm HDMI type.

Use a USB-C or DisplayPort (if available)

If your PC has a USB-C port with DisplayPort support, you can use a USB-C to HDMI adapter to connect the second monitor.

• Check the side or back of your PC for a USB-C port.
• If available, try this:
  • Use a USB-C to HDMI adapter.
  • Connect your Samsung monitor via HDMI to the adapter.
  • Power on the monitor and PC.

Detect Display Manually in Windows

Sometimes Windows doesn’t auto-detect displays. Try this:

• Right-click on the desktop → Display settings.
• Scroll down and click Detect under “Multiple displays”.
• If detected, choose Extend these displays.

Update Graphics Drivers

Outdated drivers can prevent detection.

• Go to Device Manager → Display adapters.
• Right-click your graphics card → Update driver → Search automatically.
• Or visit HP Support Assistant to auto-detect and update drivers.

Test Monitor and Cable

You mentioned testing with a laptop, which is great. If the monitor works with your laptop, it’s not the monitor or cable.

If your PC only has HDMI-in and no USB-C with video output:

• You cannot connect a second monitor directly.
• You can use a USB-to-HDMI external graphics adapter (like a DisplayLink adapter) to add a second display. 

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. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support