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No control of screen brightness

HP Recommended
HP 27q 3FV90AA model
Microsoft Windows 10 (64-bit)


I just purchased this monitor. It is running with a Nvidia  Quadro 5000  on win10 64 bit pro.

Initially it would not recognise the DVI input from the card although my old 22" HP  LE2202 was fine.  I either got No Signal or Out of range messages. It did see 1080p (19200 x 1080) resolution via a Display port to HDMI adaptor  but not until windows was up and running - so no POST screen.

When I connected via a display port - display port  lead it is far too bright for the Hobbit - Hole that I work in, but does see the startup screen.

When I get into the OSD menu at 2560 x 1440 resolution, the Picture tab is violet and cannot be accessed so I cannot change the brightness.

The manual suggests that this should be possible.

I have the latest drivers installed from HP and Nvidia.

Any ideas?

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@Dangerous2A Welcome to HP Community!


I understand that you are unable to adjust the screen brightness. 


Do not worry. I will try to fix the issue.


  • Select action center  on the right side of the taskbar, and then move the Brightness slider to adjust the brightness. (If the slider isn't there, see the Notes section below.)

    Brightness slider in action center

  • Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. To find out if your PC supports this, go to Settings  > System > Display. Under Brightness and color, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. This automatic setting helps make sure your screen is readable wherever you go. Even if you use it, you can still move the Change brightness for the built-in display slider to fine-tune the brightness level.
  • Notes: 
    • You might not see the Change brightness for the built-in display slider on desktop PCs that have an external monitor. To change the brightness on an external monitor, use the buttons on it.

    • The Brightness slider appears in action center in Windows 10, version 1903. To find the brightness slider in earlier versions of Windows 10, select Settings  > System > Display, and then move the Change brightness slider to adjust the brightness.

    • If you don't have a desktop PC and the slider doesn't appear or work, try updating the display driver. In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results. In Device Manager, select Display adapters, then select the display adapter. Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions.

Keep us posted,

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Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post, 

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Thanks for your assistance.  I had tried several 27q drivers.

This monitor is running with a  reconditioned HP Z420 tower and  Nvidia Quadro 5000 video adapter with Win10 64 bit pro. Definitely a desktop type setup.

I eventually solved the issues by finding the correct driver package from HP. I had to search by product code before I found the appropriate one (and the correct manual) as it seems that there are many variations on the 27q unit. Even the HP "Find my device" only came up with a generic monitor.

Once the correct drivers were installed and using the DVI input, I had control over the monitor from the buttons below the screen via the picture / brightness  or / contrast tabs. These were all purple before.

I did see a lot of criticism on the internet of the limited control range for brightness and contrast though, and I still feel that it could be useful to have more control at the monitor as I have the brightness almost at zero.

The blacks were still grey and I had to do some serious tweaks to the Video card to get acceptable results.

The monitor now seems OK certainly on DVI. I did find that using a DVI - HDMI converter the resolution was limited to 1920x1080.  With DVI it is possible to get the maximum resolution.

So far I have not tried the Display Port as the DVI is fine and I do not have a long enough lead at present for the DP connection. I don't know if that will affect the brightness etc.

Thanks again.



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