1. graphics driver problem. You can try to update the graphics card driver or re-install the graphics driver, and suggested that adjust the resolution and refresh rate, may also be related to the LCD response time.
2. graphics problems. You can try to re-plug, and clean the cheat, and you can observe whether the graphics card is running properly.
3.data line problems. Need to replace the data line to see, or check whether the data line is bent.
4.screen line problems. That is, VGA line, check whether the connection is normal, there is no loose problem. You can replace a good quality VGA cable try, another VGA line away from the power line far.
5.display problems. The monitor connected to other normal computer, if the problem is still the monitor may be the problem.
