Multiple Monitors going to sleep on their own…

We have recently rolled out a lot of equipment to multiple stores. Everything has been working fine for months. Recently, some but not all of the monitors seem to be going to sleep on their own.

I have checked all of the power options and they are turned off. This is affecting different monitors and all of these machines are from the same image… even the one’s that aren’t experiencing the issue.

Any ideas? I have searched google and checked everything on the PC.