taehyun
Can you access the BIOS now? If so, please provide a screenshot of your machine’s BIOS main page.
Please try the following methods:
①Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. On Save&Exit page, please click Restore defaults, press enter to confirm, then press F4 to save.
②Please press delete key as soon as you restart the PC, so that you can go to BIOS. Then go to boot page, set SSD as the first option.
③Please take out the SSD and reseat it securely.
④Please reinstall the system.