When I connected my new HP EliteBook which runs MS Windows 7 Enterprize 64bit to the new HP Z22n external monitor, the monitor screen began to intermittently start flashing off for about 3 seconds to a black screen. It continues to do that especially if I'm on windows 365 email or doing anything other than just alowing the screen to sit idle. I have tried another much older Toshiba laptop runing windows 10 and have no issues at all. I have even tried a docking station and different cords to pair up the 2 HP devices with no change. The Black screen continues to pop up, off and on. Any suggestions? Help?