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HP Recommended
Microsoft Windows 10 (64-bit)

I am having hideous problems with the HP display drivers - can anyone help?

I have an HP Elitedesk Mini 600 G9.

It has the extra two display ports around the back, and HP display adaptors to a VGA monitor cable.

It was working fine until last week, then a few minutes after boot, the screen went black.

Now, when powering up with only ONE monitor connected, the screen briefly shows the windows splash screen, then goes completely black, and the monitor says no *valid* signal is being received.

However, if I plug two monitors in, it works perfectly, and I can control the resolution etc just as normal. 

I have the latest version of the HP Display drivers. I've tried rolling these back, and even deleting them so the PC loads the latest ones automatically. No dice. When I delete the driver, the PC defaults back the the Windows Generic Display driver, which works (but is very laggy), but then as soon as it has a chance the PC downloads the correct latest version of the driver which kills the display if only one is plugged in, but works fine with two.

If I run the PC without the net plugged it, it works on the Windows generic driver, but as soon as it connects to the net, it downloads the latest driver, and kills the display.

I've plugged in a separate monitor which tells me what it's getting from the PC, and says it's getting a ridiculous high frame rate (well above the 60Hz I would expect) and at an ultra high resolution.

But of course I can't change this - as I can't see the display to change the frame rate / resolution.

If I plug in two monitors, and use the second one to set the display, and set it for only display on one monitor, at a normal resolution, it works fine until I power down the PC. But then the fault reoccurs as soon as I power it up again.

At a *guess* what's happening is that as soon as the PC downloads the correct driver again, in a single monitor setup, it finds the previously saved resolution / Hz and defaults to that, which is why the monitor shuts down. And of course I can't see it to change it.

Is there anywhere in the system registry, or anywhere, where the monitor settings are saved that I can delete?

OR failing that, any other suggestions as to how to get the current display drivers to work as they used to?

1 ACCEPTED SOLUTION

Accepted Solutions
HP Recommended

I hate answering my own question - but I've found a devious fix that solves the problem.

It was, as I suspected, the drivers revering to a silly impossible to display mode when only one screen was plugged in, which was of course impossible to see, or solve conventionally.

However, I downloaded a screen casting app to see what was happening to the screen settings when it went blank, and cast the PC screen to my phone, which mirrored the display without changing the display mode.

Sure enough, as soon as I unplugged one screen, the remaining screen settings reverted to a ludicrous resolution at an insane frame rate.

However I could view the cast of the screen so I could just go in and set them to normal values, whereupon the screen worked again. And by setting them, it remembers it even when powering off.

Hurrah! I'm no longer in the dark.

Hopefully this workaround helps others with the same blank screen problem.

 

 

View solution in original post

1 REPLY 1
HP Recommended

I hate answering my own question - but I've found a devious fix that solves the problem.

It was, as I suspected, the drivers revering to a silly impossible to display mode when only one screen was plugged in, which was of course impossible to see, or solve conventionally.

However, I downloaded a screen casting app to see what was happening to the screen settings when it went blank, and cast the PC screen to my phone, which mirrored the display without changing the display mode.

Sure enough, as soon as I unplugged one screen, the remaining screen settings reverted to a ludicrous resolution at an insane frame rate.

However I could view the cast of the screen so I could just go in and set them to normal values, whereupon the screen worked again. And by setting them, it remembers it even when powering off.

Hurrah! I'm no longer in the dark.

Hopefully this workaround helps others with the same blank screen problem.

 

 

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.