Powershell script to turn display off

Set-DisplayOff.ps1

# Turn display off by calling WindowsAPI.
 
# SendMessage(HWND_BROADCAST,WM_SYSCOMMAND, SC_MONITORPOWER, POWER_OFF)
# HWND_BROADCAST  0xffff
# WM_SYSCOMMAND   0x0112
# SC_MONITORPOWER 0xf170
# POWER_OFF       0x0002

Add-Type -TypeDefinition '
using System;
using System.Runtime.InteropServices;
 
namespace PVL {
   public static partial class WindowsAPI 
   {
      [DllImport("user32.dll", CharSet = CharSet.Auto)]
	   public static extern IntPtr PostMessage(
         IntPtr hWnd,
         UInt32 Msg,
         IntPtr wParam,
         IntPtr lParam
      );
   }
	
   public static partial class Utility
   {
		public static partial class Display
		{
      public static void PowerOff ()
      {
         WindowsAPI.PostMessage(
            (IntPtr)0xffff, // HWND_BROADCAST
            0x0112,         // WM_SYSCOMMAND
            (IntPtr)0xf170, // SC_MONITORPOWER
            (IntPtr)0x0002  // POWER_OFF
         );
      }
	  }
   }
}
'

function Set-DisplayOff {
   [PVL.Utility+Display]::PowerOff();
}

Hi can you please make opposite of this script,
i am currently using this script to turn off the monitor (task scheduler) @ 5:01pm
and have another script to reboot machine at (task scheduler) @8:59am - shutdown /r

this computer does not have keyboard or mouse attached thats why need an script
Thank you