PC stopped detecting 2nd monitor

[tbellina]

I have an HP Pavilion 23 All-In-One Touchscreen desktop PC and am running Windows 10.  I have had a second HP monitor connected for about a year now and everything has been fine.  But since yesterday, the second monitor is not detected.  I have connected the monitor to another computer using the same HDMI cable and it works.  The display adapter indicates it is working properly and I have uninstalled and reinstalled it.  I have also updated the graphics driver.  Nothing has helped.  Any suggestions on what else I can try?

[asmita6658 · Accepted solution]

Hi @tbellina

Welcome to the HP Support Community. I'd be happy to assist you with the HDMI issue.

Let's try these steps -

1) In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results.
2) In Device Manager, expand Display Adapter. 
3) Right-click on the Display Adapter, and then select Uninstall device > Delete the driver software for this device check box > Uninstall.
4) Restart the computer. 

Download and install the BIOS, Chipset drivers from this link. 

You may also refer to - HP PCs - Troubleshooting HDMI Display and Sound Issues (Windows) 

Hope this helps! Keep me posted. 

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