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Screen going black for a second repeatedly.

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#21
gem7680 said:
It did start after the windows 11 update.
Click to expand...
Roll back to a time before the update with system restore or remove update


Remove an installed Windows update​

If you've recently installed a Windows update, uninstall the update to try to resolve the issue.
  1. Select Start > Settings > Windows Update > Update history > Uninstall updates .
    View update history
  2. On the list that appears, select update you want to remove, and then select Uninstall.

or go here Click on me and scroll down to system restore and read how
 
#22
I've had the laptop connected to the TV (TCL Smart TV) for a number of hours yesterday and a few days before and it didn't flash once, I've just connected it back to the Acer monitor and it's flashing and is black most of the time.

The Acer monitor was used with another laptop and was fine the whole time.
 
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