2, check whether the hard disk connection is loose; After there is no abnormality, check the hard disk for errors;
3. Check the memory, remove the memory stick and dust off the memory stick and card slot (sometimes the contact may be false);
4. Regarding viruses, it is recommended to scan and kill viruses in safe mode (press F8 to select safe mode, and those who cannot enter will see the next one);
5, try to restore the BIOS to the factory state (novice caution);
6. After installing the system, confirm whether the hardware driver is successfully installed;
7. The above check is correct, but it still has no effect. Please reinstall the operating system (it is best to find a favorable system disk, most of which are recognized);
8. If the screen is still blue after reinstalling the system, the problem should be that the hardware is incompatible (pay more attention to the new fleet and find no seller);
9. Ask businesses or friends who are familiar with computers. Maybe they will help.
10, good luck!