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VH240a monitor intermittently goes black for a few seconds

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VH240a monitor
Microsoft Windows 10 (64-bit)

My VH240a monitor works normally, except that it intermittently goes black for about 2 seconds, then returns.  There is no other sign of distress like screen flicker or distortion.  It goes from a perfect display to black then back to the perfect display.


I'm using it with an older Dell running Windows 10 which does not have issues with other monitors.  It is connected with the HDMI cable that came with the monitor.

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@shteebo Welcome to HP Community!


I understand that the monitor intermittently goes black for a few seconds.


Have you tried with different HDMI cables?


Please perform the below steps.

  1. Cycle the power on the monitor as follows:

    1. Turn off the monitor. The power light on the monitor should be off. Leave the computer turned on.

    2. Unplug the power cord.

    3. Wait 5 seconds.

    4. Plug in the power cord.

    5. Press the power button on the monitor to turn on the monitor.

      One of two things happens:

      • The image from the computer displays on the monitor and you can use the computer again. This indicates that the monitor was unable to detect that the computer had awakened from suspend mode. Turn the monitor off when it is not being used or disable suspend mode on the computer. For some computers, updating the BIOS can correct these types of suspend problems.


      • The power light on the monitor comes on but the screen displays one of the messages again. The monitor is not receiving a video signal from the computer that it can detect and use. Continue using these steps.

  2. If the computer is on, wait until the hard drive activity light on the computer is not lit and then press and hold the Power button on the computer case until the computer turns off.

  3. If the monitor has a factory reset or restore option, set it. Press the Menu button on the front panel and select Factory Reset.

  4. Wait 5 seconds and then turn on the computer by pressing the Power button again.

Check for the windows update.


1) In the search box, type, and open Windows Updates.

2) Check for updates.

3) If the updates are available, click on install and restart the computer.


Please uninstall and reinstall the graphics drivers.


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, 

Have a great day!


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