Materials required: computer, WIN7 64-bit system.
First, after turning on the computer, click the "WIN key" on the keyboard.
2. Click Control Panel in the pop-up menu.
3. Find "Adjust screen resolution" in the control panel, and then click "Open".
4. Click the "small arrow" on the right side of the resolution, select the one with the word "recommended" in the pop-up resolution, and then click "Apply".
5. After the screen is black for about two seconds, a window will pop up whether to keep the settings. Finally, click "Keep Changes" to solve the problem.