Sounds a lot like what I experienced.
If the suggestion by GaseousBeatle92 worked then that is it.
If not you might like to see if it is possible to adjust various settings on your monitor. If your monitor has some buttons or dials that make it possible to change contrast, level of light etc., that might do the trick. That is what worked for me. But the exact way to adjust these settings vary from monitor brand to monitor brand.