monitor goes in sleep mode

[marco.gulotta87]

shame on me, it has a small button, i found it xD

 

[R0GG]

Check your monitor menu for power option or shutdown timer and turn it off, that isn't a message windows would display, it's definitely your monitor informing that's about to shut down as per timer settings

 

[punkncat]

I would look at page 36 of your manual for the setting of turning off Automatic Standby and see what that does.