HDMI not working

[ajde]

Hello. 
My hdmi stopped working at once. I didnt use it for a few months, then i tried to connect a TV to a laptop - nothing, then I tried to connect laptop to another monitor - no connection. In display settings it says "didnt dedect another display". I'm using HP Pavilion Gaming Laptop 15-ec2xxx. 

I tried to reinstall amd graphics driver (integrated), reinstall nvidia graphic driver, none of it seems to work. HDMI cable works on another laptop. When I click on sound > playback there is nvidia high definition audio output and it says "not plugged in". 

[Kuroi_Kenshi]

Hi @ajde,

Welcome to the HP Support Community! 

We're thrilled to have the opportunity to assist you and provide a solution.

It looks like your HP Pavilion Gaming Laptop 15-ec2xxx is not detecting external displays via HDMI. Since you’ve already tried reinstalling the AMD and NVIDIA graphics drivers, let’s go through more troubleshooting steps:

Check Basic HDMI Connection Issues

1. Ensure the HDMI cable is firmly connected to both the laptop and the external display.
2. Try a different HDMI cable, even though your current one works on another laptop.
3. Use another HDMI port on the monitor/TV, if available.

Manually Detect the Display

1. Right-click on your desktop and select Display settings.
2. Scroll down and click Detect under "Multiple displays."
3. If it still doesn’t detect, try pressing Windows + P and selecting Duplicate or Extend.

Check NVIDIA Control Panel

1. Right-click on your desktop and open NVIDIA Control Panel.
2. Under Display > Set up multiple displays, check if the external display is listed.
3. If not, click Rigorous Display Detection at the bottom.

Update or Roll Back Graphics Drivers

Since you’ve already reinstalled drivers, try rolling back to an older version:

1. Open Device Manager (Win + X > Device Manager).
2. Expand Display Adapters and right-click NVIDIA GPU > Properties.
3. Go to the Driver tab and click Roll Back Driver (if available).
4. Do the same for the AMD integrated graphics driver.
5. Restart your laptop and test again.

[Kuroi_Kenshi]

Alternatively, install the latest drivers directly from:

• AMD (for integrated graphics): AMD Drivers
• NVIDIA (for dedicated GPU): NVIDIA Drivers

Check HDMI Output in Sound Settings

Since your NVIDIA High Definition Audio says "Not Plugged In", try this:

1. Right-click the sound icon in the taskbar and select Sounds.
2. Go to the Playback tab and look for NVIDIA HDMI Output.
3. If it’s Disabled, right-click and select Enable.

Power Cycle & BIOS Reset

1. Power off your laptop and unplug it.
2. Press and hold the power button for 30 seconds to drain any residual power.
3. Reconnect everything and boot up.
4. If still not working, enter the BIOS (press F10 during startup) and check if external display options are disabled.

Let me know which steps worked for you or if you need more help! 😊

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?"—your feedback not only keeps us going but also helps others find the solution faster! 👍✨

Take care and have an amazing day ahead! 🚀

Best regards,

[ajde]

Hello. Thank you for your tips. I tried another HDMI cable but the problem remains. Option to roll drivers back is unavailable.  Other solutions also dont work. I dont have display options in my BIOS. Also this is how my nvidia control panel looks like: 

https://ibb.co/WNbcXDTS 

No display options. 

[Kuroi_Kenshi]

Hi @ajde,

Thank you for the response

Since basic troubleshooting didn’t resolve the HDMI not working issue, here are advanced steps to diagnose and fix the problem:

Check Windows Display & GPU Settings

• Press Win + P and try Duplicate or Extend mode.
• Open Device Manager → Display Adapters
  • Right-click AMD & NVIDIA GPU → Uninstall device → Restart PC (Windows reinstalls the drivers).
• Open NVIDIA Control Panel → Set up multiple displays and check if an external display appears.

Force Windows to Detect HDMI Monitor

• Open Device Manager → Monitors
• Click Action → Scan for hardware changes
• Go to Settings → Display
  • Scroll to Multiple Displays → Click Detect

Enable HDMI via Registry (if missing)

1. Press Win + R, type regedit, and hit Enter.
2. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers
3. Right-click → New → DWORD (32-bit) Value
   • Name it EnableHDMI
   • Set Value to 1
4. Restart your laptop.

Force HDMI via Safe Mode

1. Boot into Safe Mode (Shift + Restart → Advanced Options → Safe Mode with Networking).
2. Uninstall ALL display drivers via Device Manager.
3. Restart and reinstall AMD & NVIDIA drivers (from HP’s support site).
4. Test HDMI before reinstalling any extra software.

Update Firmware & Chipset Drivers

• Update your BIOS & chipset drivers from HP’s support site.
• Go to HP PC Hardware Diagnostics (UEFI) (Esc on startup → F2)
  • Run Component Tests → Video/Graphics to check for failures.

Let me know what works! 😊

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?"—your feedback not only keeps us going but also helps others find the solution faster! 👍✨

Take care and have an amazing day ahead! 🚀

Best regards,