Brand NEW XF240YM3 Monitor Screen Flickering Black for 5 Seconds

Please follow the steps below and check if it helps resolving the issue:-

• Update the windows on your computer as updates sometimes fixes any windows issues

Press windows key + I
Click on Updates & Security
Click on Check for updates
Wait until windows fetches all available updates for your computer
Download and install the updates for your computer

Restart and check if everything works fine

If the above method did not resolve the issue, please try to rollback the display adapter driver installed on your computer since updating it did not resolve the issue

Press windows key + X
Select Device Manager
On the device manager, locate and expand display adapters
Right click on the display driver that is currently installed
Select Update Driver
Select Browse my computer for drivers
Select Let me pick from a list of available drivers on my computer
List of installed driver will be displayed, select an older driver and hit next until the process completes.

You may also need to disable all non-Microsoft services on your computer to make sure that they are not causing or contributing to the issue

Perform Clean Boot

• This process will eliminate 3rd party application running in the background of your computer along with services that are not needed to run windows. If there's any conflicting 3rd party application that causes the issue on your computer, this process will stop it.

1. Open the run box by pressing the Windows Key + R and type msconfig
2. System Configuration Utility box will open and by default you are on general tab.
3. On the General tab, click the selective startup and make sure that load system service and load startup items both have checked mark.
4. Click on services tab
5. Put a check mark on Hide All Microsoft Services > This is a very important part as if you miss to click on this, computer might not boot properly or permanently and will end up on clean installation.
6. Once Hide all Microsoft Services have checked mark on it, click on Disable All
7. Click on the Startup Tab and click open task manager. This will open another window which contains all your startup applications on the administrator account.
8. Disable all application that you're not using. You can simply just click on them and select disable.
9. Click OK , Apply and close the configuration utility

Restart the computer and check if the same issue occurs.

Hope this will helps.

If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful.