No video output from VGA Port after Windows update

[AK1010]

Hi. During a recent Windows update (July 2018), my laptop (DM1-4170US) lost video output from the VGA port.  I had a projector connected to my laptop the exact moment the computer restarted to finish installing the updates.  (I was in a presentation break).  After that, no more video output from the VGA port.  This is why I am pretty sure this must be a software issue.

The laptop’s screen and HDMI output are working perfectly fine.  The problem is just the VGA port.  It worked perfectly before the updates.

I have already tried installing all the latest drivers available for this laptop from hp's support website (BIOS, chipset, etc.) and all Windows updates as well, and I cannot get the VGA port to work again.  This is very strange, because when I plug an external monitor on the VGA port, the laptop recognizes it, and even shows the brand and model of the monitor connected in the control panel!  However I cannot get it to output any video signal again.

I have (of course) already tried connecting a few monitors and projectors with different VGA cables as well, with no success.

I have been struggling for months trying to fix this issue, with no luck.  I would greatly appreciate any suggestions.  Thank you all.

[AK1010]

I forgot to mention that I already tried restoring the computer to an earlier configuration (via System Restore), with no luck either.

[Jeet_singh]

@AK1010,

Thank you for showing your interest in HP Support Forums. It is a great place to find the help you need, from other users, HP experts, and other support personnel. I see from your post that you are having issues with the display not working while connecting using VGA on your HP notebook. Don't worry we're here to help you.

Splendid effort and fabulous description of the issue before posting. Kudos to you on that score.  You are a valued HP customer and it is paramount to assist you here. I take it as a privilege to share this platform with you. 

In this scenario, I would suggest here is to run a test on the graphics from F2(Please remember to capture the failure ID for further assistance).

Depending on the test results, If the test fails then this is clear indication of a hardware failure.

If the test passes, I would suggest here is to run a system reset on your PC - For more details, please follow this link: HP PCs - Resetting Your Computer (Windows 10)

Please let me know if this resolves the issue, or if you require further assistance!

Eagerly waiting for your response!

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.

[AK1010]

@Jeet_Singh

Thank you very much for your prompt and kind reply.  As per your suggestions, I have performed all the boot up (F2) Tests (Start-Up, Run-In, System Tune-Up, Memory Test, etc.) and all of the tests passed.  I also installed the HP PC Hardware Diagnostics for Windows software (which includes all the System and Component tests) and they all passed as well!

Do you think it is worth it to try to do the system reset?  Does it sound logical to you that this problem could be a software or firmware issue? 

You kindly put a link in your reply on how to do the system reset, but it refers to a Windows 10 machine.  My laptop is running Windows 7 64-bit.  Is it possible to do a similar system reset on Windows 7 as well?  Or do I have to reinstall all the software (windows, office, etc.) again?  What would your suggestion be?

Once again, thanks a lot.  I really appreciate your help. 

Best regards.

ALEX

[Jeet_singh]

@AK1010,

It's great to have you back and your patience is greatly appreciated.

I'm glad you pointed out as I might have overlooked and provided you with the wrong link.

As you have mentioned in your post that you have run the test and everything seem to have passed, this definitely looks like a software related issue.

I would suggest you try to perform a system recovery using the partition available on your PC. 

Doing this will wipe off everything and set the computer back to the original factory conditions. So, please remember to back up your data before initiating system recovery. If for some reason the recovery fails. The only other way to install Windows would be to order the recovery media for your laptop and using the recovery media you can install Windows. You can check if the recovery media is available online on www.hp.com/drivers by entering the exact model no. of your laptop. To find the exact model no. click here: http://hp.care/2bygf7l

HP PCs - How to Reset Your Computer to Factory Settings (Windows 10, 8, 7)

Here's what you need to know about obtaining a recovery media for yourself: HP PCs - Obtaining HP Recovery Discs or an HP USB Recovery Drive

Otherwise, I will share you a private message with details. Please watch your inbox for more information.

Let me know if this helps!

Have a great day ahead! 🙂

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