Fix Monitor Flickering Issues
What to do if your external monitors randomly flicker throughout the day.
1. Check to make sure cables are plugged in all the way.
2. Check cable compatibility.
3. Check for any electrostatic interference.
4. Install driver updates for computer/dock.
5. Install monitor specific drivers.
6. Make the refresh rates on both monitors the same.
7. Apply registry fix:
Open Registry Editor and go to "Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000"
Then right click add DWORD DPMstDscDisable and set the value to 2.
8. If none of this work may need to replace dock or monitor.
In our organization we use Dell Latitudes with Dell WD19 docking station.