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Monitor goes blink for a few seconds


I experience the monitor to go blink, and come back after a few seconds (anything between 2 to 10 seconds) Have not been able to find the exact root cause as it seems random. 

However, what I did notice is that it often happens when:

- I switch on/off my Bluetooth keyboard or mouse (Logitech MX series)

- I work with VirtualBox

Not sure if the above helps to pinpoint the cause.

I have a direct usb-c connection from NUC to Monitor, monitor is LG 27UL850-W. Using the cable that came with the monitor.

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