In the Control Panel>Accessibility>Display
If the high contrast box is checked, uncheck it.
When you say in "Add program", where is that exactly? Under Display in the Accessibility window I only see High Contrast Options andCursor Options. Did you maybe change a program in the Control Panels "Add or Remove Programs" section? It's either that
your monitor may be entering power saving mode.
This problem could be that your Power Options in the Control Panel have been switched to "switch off the component ever now and then to save power". To change this, do the following:
1) Navigate to the Control Panel by clicking Start and then Control Panel
. Then double click on Power Options
as shown below circled in red.
2) This will then display the Power Options window as shown below.
3) Once you have opened the Power Option Properties, under Power Schemes
select the one that best suits your PC system.
4) Then you can select whether or not to switch off your monitor and/or hard drives after a period of time when it is not being used.
If you have your PC on most of the time then I suggest you select Never
as the turn off option for both your hard drive and monitor. If you are using a laptop the turning off the hard drive and screen can however save on battery power when the laptop is not in use.
If your problem persists then it might just be as simple as a loose connection, make sure that your monitor display plug is correctly plugged into your display card or onboard display correctly.
Let me know how it goes.