2. If it is not for this reason, the resolution of the screen may be set incorrectly. Click the right mouse button on the blank space of the desktop → screen resolution.
3. Usually, the screen split ratio is 800×600, and such an abnormal situation may also occur.
4. The adjustment step is: Click the drop-down arrow on the right to use the resolution matching the screen.
5. In the pop-up menu, it is usually the most suitable → application recommendation.
6. After confirmation, there will be a blank screen for a period of time, and then there will be a prompt dialog box to choose to keep the modification and restore (countdown).
7. If this is not the case, it is caused by the abnormal driver of the graphics card device, which often happens after updating the graphics card driver. Just get back in the driveway in time. Start → Control Panel → System → Device Manager.
8. If the video card adapter has a yellow warning number, it is an equipment abnormality.
9. Right-click the video card device → Properties.
10, rollback the driver → follow the prompts to return to the driver → restart the computer.