1. Try "Default settings" in BIOS, if you can get that.
2. If your computer has warranty, take it to service. Being physically able to examine the computer is something quite else than trying to solve problems here. Generally, it's good to build a [personal] relationship to someone who really knows, it's long term.
3. A stone age thing that isn't very much noted today is the CMOS, and battery thereof. Nullify your CMOS, perhaps renew the battery, they are sometimes with fault.
Something may be found at
https://forums.lenovo.com/t5/Lenovo...ld-not-change-bios-setting-B570e/td-p/1000259
Very unsure here. Best wishes.