Lenovo laptop 100- 15 1bd can't stop.

1, the boot disk set by BIOS is wrong, so the boot disk is set to floppy drive to start first, but there is no floppy drive on the computer;

2. Bad hard disk contact, wrong hard disk mode setting, and wrong hard disk MBR.

3. Check the optical drive, USB flash drive, floppy disk, etc. , if any, take it out;

4. Enter the BIOS and set the hard disk startup in the startup item setting as the first startup disk, whether it is possible to start the restart attempt;

5. Enter the BIOS, modify the hard disk mode, set different modes and try to restart to see if it can be started;

6. Disassemble the chassis, unplug the hard disk cable and reconnect it, and then try whether it can be started;

7, pay attention to listen to the boot process and touch the hard disk rotation is normal;

8. Press Ctrl+Alt+Del to restart the computer.

9. Press F8 to enter the mode, and select the last correct configuration or normal startup.