HDMI connected. Monitor recognized. No Signal to external monitor.

[aParadis123]

HDMI connected. Monitor recognized. (I see the monitor model in the control panel) BUT No Signal to external monitor. Monitor goes to sleep.

Everything had been working fine for the last three years until a couple of months ago when this started happening. I have since tried with many different monitors and projectors and various cables to no avail. Dead in the water.

I have followed these troubleshooting steps from previous post. No change.

From 2018 "HDMI Port Not Working":

For me to assist you with accurate information I would require more information regarding this.

• Did you connect this computer to another external TV or screen to it and check if it works?
• Did you try multiple HDMI cables?
• Please provide the complete model# of the computer to assist you better.

For now please try these steps:

• Right-Click on start button> click device manager> expand display adapters>then select the display drivers that are listed and right-click on it and uninstall the drivers.
• Check the box that states delete the software for this device.
• Then restart the computer and update the bios chipset and graphics drivers from this link: http://hp.care/2syreDe  after following the on-screen instructions and selecting the correct Operating system.
• If it still does not fix the issue, please perform the relevant steps for HDMI related issues from this link: http://hp.care/2rKIvXg regarding video issues. If there is no hardware issue with the computer, this should do the trick for you.

[Echo_Lake]

@aParadis123

Thank you for posting on HP Support Community.
 

Don't worry as I'll be glad to help, 

I understand that your HP notebook HDMI connection is not working correctly. I appreciate your efforts to try and resolve the issue. 

The last thing I can suggest trying to restore a computer back to the factory default, which will isolate whether it’s a software or hardware issue. 

The HP Cloud Recovery Tool allows you to download recovery software to a USB drive. You can use the downloaded recovery image file in order to install the Windows operating system. 

• Click here: https://support.hp.com/in-en/document/c04758961#AbT3to perform System Recovery (Windows 10) 
• Click here: https://support.hp.com/in-en/document/c06162205 to Use the HP Cloud Recovery Tool (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.

[aParadis123]

Hello Echo_Lake

Thank you for the quick reply. 

Wow, those seem like extreme and risky solutions. 

Have you ever seen this kind of behavior before ? (Connected, seing the monitor(s), not signal)

My machine didn't suffer any choc, nothing changed. The only thing that changes on a regular basis are Windows updates. 

I know for a fact, for example, that Windows 10 updates did break my battery recharge function on repeated occasions.  I was able to fix it by simply going into the Bios and doing a hard shutdown. Simple as that... (Doesn't help with HDMI though)

Is there any other way to assess before rebuilding the machine from scratch ? 

Thanks in advance ! 

[Echo_Lake]

@aParadis123

Thank you for posting back.

This sounds like a software driver glitch issue with the OS., performing a factory reset will isolate the issue. 

If you still need additional technical assistance that can be better provided through one-on-one interaction or a remote session with our HP Support team if you would like to continue troubleshooting.
 

I would request you to contact our Support and our Support Engineers should be able to sort this out. HP Support can be reached by clicking on the following link: www.hp.com/contacthp/

Please feel free to contact us here anytime you need any further assistance. Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

Have a nice day ahead.