E2016HV, how to turn off PSM?

Hi,

I bought a Dell E2016HV and I am using it for my laptop and for my Xbox. The problem is that when I connect it to my Xbox, the PSM (power save mode) appears and doesn't let me play? I used to play with an older monitor and I didnt have this problem. The problem is only with my Xbox. With my laptop it works perfectly.

I would appreciate any help from you