The monitor cannot be turned off

[arbaicat]

Hello, I'm looking you work for one month ago until I get this laptop(XPS9500-10875-1920X1200), Fedex is so slow. I find an issue is that when I leave the laptop alone, a few minute, It's monitor can't work again, but the laptop still working because I am listening music. can you fix this issue?If you reject this common, Can you tell me how can I use it, when I want close the lid. What ever, Thank you so much!

[nikoelt]

In Terminal do the following:
sudo pmset lidwake 0
sudo pmset autopoweroff 0
sudo pmset powernap 0
sudo pmset standby 0
sudo pmset proximitywake 0