Third monitor detection

[Lee554]

I am running my All in one PC with a second monitor (M27 fwa) with no problems. It is connected via HDMI and I work on extended displays. I have connected a third monitor which is the exact same model as the second monitor and the PC will not detect. It is connected to the PC on HDMI2 (second monitor is HDMI1) but will not detect at all. It is not the cable.

I'm guessing it's something relatively simple but I'm struggling with this one. 

[Gaya1239]

Hi @Lee554, 

Welcome to HP Support Community.  

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

I see that you are facing issues with your Connecting third monitor.

Please try the following Troubleshoots steps.

Step 1

1.    Turn off the Unit.

2.    Disconnect the AC adapter.

3.    Remove any discs from the disc drive.

4.    Remove memory cards from the card reader slot.

5.    Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.

6.    Disconnect the AC adapter press and hold the power button for approximately 15 seconds.

7.    Reconnect the AC adapter, and then turn on the computer.

Reconnect, the power cable, keyboard, mouse and then monitor, and then power on the PC.

Step 2

Turn off the unit and please press and hold the Windows key + letter B key and the power button together for 30 seconds after 30 seconds, 1st release the power button but keep holding the Windows key and B key for ten more seconds and then release these two keys If done correctly, you will see the display flashing once. Please attempt it thrice as this step and  Restart the unit

Step3

The unit has to be turned off, Press Win+ V while holding these two keys then Press the Power button, continue to hold all three keys for 30 seconds and then release the Power button first and then release these two keys Please attempt it thrice  and then you may get a Pop-Up CMOS Check and it will restart the unit 

Even if you don't get a Pop-up restart the unit manually after 3 attempts.

Please check and update Windows and HP support assistance drivers 

And update Bios and other drivers please click on the link. to update the drivers. 

Please run the Hardware test on computer   HP PCs - Testing for hardware failures

Click here to HP PCs - Using two or more monitors with one computer (Windows 11, 10)

Click here  to HP PCs - Connecting to a wireless monitor or smart TV (Windows 11, 10)

Hope this helps! Keep me posted. 

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