External monitors on my HP Envy M7 Notebook product # M1W11UA#ABA

[winegoupy]

I know I am beating a dead horse here but I am having a problem with this laptop detecting a third monitor.  here are my issues:

1. Windows 10 will not detect the third monitor I have updated drivers, restarted system, disabled video adapters, etc.

2. When my display setting are set to "only show two monitors, my third monitor will work but there are two mouse pointers, one on each of my external monitors.

I am using an HDMI Port with a HDMI Splitter.

Any help would be great

[Echo_Lake]

@winegoupy
Thank you for posting on the HP Support Community.

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

Extend or duplicate the desktop with a second monitor.

1. Right-click anywhere on the desktop, and then click Display settings (Windows 10) or Screen Resolution (Windows 8).

2. Make sure the correct number of monitors displays.

   Windows 10

   

   • If all of your monitor's display, continue with these steps.

     NOTE: Two monitors might display as one, with 1|2 in the center, indicating the same screen duplicated on two monitors. To change to an extended desktop display, continue with these steps.

   • If not all of your monitor's display, make sure the cables are securely inserted and then click Detect.

3. Scroll down to Multiple displays, if necessary, click the drop-down menu, and then select a display option.

   To set up a wireless monitor, click Connect to a wireless display.

   If you cannot change the display options, go to the section to Configure the display with the graphics driver.

4. Adjust the screen resolution and orientation, as necessary.

5. Extended desktop only: Match the monitors on the display to how they are physically positioned. To identify the monitors, click Identify. Numbers display on the monitors to help you arrange them.

6. Windows 10: Click Keep changes, if necessary, to save the new display settings.

Click here: https://supportvideos.ext.hp.com/detail/video/4370628123001/how-to-set-up-multiple-monitors-in-windo... to know more about HOW TO SET UP MULTIPLE MONITORS IN WINDOWS 10 

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.