How to resolve the issue of a black screen with only a cursor on CentOS startup.

If you only see a black screen and cursor when booting CentOS, you can try the following methods to resolve this issue:

1. Sometimes all that is needed to resolve the issue is to simply restart the computer.
2. Check the system logs: You can check the system log files to search for potential error messages. You can use the command journalctl -xe to view the system logs.
3. Check the graphics card driver: The black screen may be caused by a problem with the graphics card driver. You can try updating or reinstalling the graphics card driver.
4. Restore system: Try booting the system using a Live CD or Live USB, and attempt to repair or restore the system.
5. Check for hardware malfunctions: it may be a hardware malfunction causing the black screen. You can check the hardware connections, such as the memory card, hard drive, etc.

If the above methods fail to solve the problem, it is recommended to seek help from professionals or reinstall the operating system.