If there are vertical or horizontal lines on the screen it could mean that the refresh rate on your display needs to be changed.
This could also be indicator of an issue with the panel of the display. If this is the case then you may need to request an RMA.
1. Check the video cables. Make sure the cable is securely connected and if possible change the cable. If using an LCD TV in Video mode, make sure the cable is connected to the correct input.
2. Try another video input to see if the flickering is not just on one type of connection.
3. Remove any devices that may cause interference, such as other monitors, TVs, radios, fans, electric clocks, etc.
4. Connect the display to another computer or use another power outlet.
5. Check the current resolution of the display and make sure that the video card or video source is compatible with the current setting that you want to display. Use the display settings recommended in the User Guide.
6. Change refresh rate in Windows, use instructions below:
Windows 8 and 10
1. Right click on START --> CONTROL PANEL
2. Double-click on DISPLAY
3. Click "Change display settings" in right hand margin.
4. Click on "Advanced settings"
5. Click on "Monitor" Tab
6. Under "Monitor Settings" is "Screen refresh rate"
7. Click on START --> SETTINGS --> CONTROL PANEL
8. Double-click on DISPLAY
9. Click "Change display settings" in right hand margin.
10. Click on "Advanced settings"
11. Click on "Monitor" Tab
12. Under "Monitor Settings" is "Screen refresh rate"