No HDMI output to external monitor

[GMilo]

Recently I lost my external monitor display.  My lapton cannot detect it. 

I have tried uninstalling both the display adaptor and  3D video controller and then scanning for new hardware. 

The display adaptor sometimes shows up with "Microsoft Basic Display Adaptor", at other times "Generic PnP Display" and the Other Device "3D Video Controller" with the warning "The drivers for this device are not installed. (Code 28)"

The graphics card is NVIDIA GeForce 940M 2G.

I have tried with a Dell and an ASUS external monitor with a new gold HDMI cable. 

Also went to NVIDIA and downloaded the current driver, no success connecting the monitor.

Seem it cant fina the hardware.  Perhaps the card is bad?

Thanks,

GMilo

[DavidSMP · Accepted solution]

Hi @GMilo,

Good Day. Thank you for posting your query in the HP community.  I reviewed the post regarding HDMI issues with the computer. Fabulous description and excellent troubleshooting were done by you. Great job! Kudos to you on that score. 🙂

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

• Did you connect it to an external TV to check if it works?
• Did you try multiple HDMI cables?

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 graphic drivers from this link: https://support.hp.com/us-en/drivers/selfservice/hp-envy-m7-u100-notebook-pc/10862139/model/11715534  after 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: https://support.hp.com/us-en/product/hp-envy-m7-u100-notebook-pc/10862139/model/11715534/document/c0... regarding video issues. If there is no hardware issue with the computer, this should do the trick for you.

Please perform all these steps patiently as it is critical to resolving the issue. The trick is to remain patient, please. Please note that I am not overloading you with a lot of troubleshooting steps. Instead,

just like you, I am eager to ensure that the problem gets resolved. So I am providing you with more resources and information at your disposal to deal with the situation better.

Let me know how it goes and you have a great day!

To simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help. If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.

Take care 🙂

Cheers!

[GSMilo]

David, thank you so much for the help.  At last, I have my extended display back!  You're a life-saver.  I have become very dependent on two displays and was struggling without.

Thanks again,

Milo

Gary S. Miloradovich

[DavidSMP]

Hi @GSMilo,

I am really happy for you that the issue has been resolved. 🙂 

It has been amazing working with you with such profound knowledge of computers and great technical skills. 🙂 Thank you for sharing this platform and giving me the privilege to share it also. 🙂

Trust me I've done everything I can to assist you by keeping your best interest in mind. I hope the unit after repair works great and stays healthy for a long time. 🙂

To simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help.

If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles. 🙂

Do take care stay healthy, keep smiling big and have a blessed year ahead. 🙂

[GSMilo]

Excellent response by DavidSMP. Clear, concise and it worked!