Lenovo Legion Y520 IKBA BIOS Unlock

[Sadziochny]

Hi!
I've got an issue (maybe damaged sensor of thermal throttling?) that blocks CPU clock on 0.8GHz and it can't unlock without restarting BIOS. It happens only when i don't plug in my laptop and im working on battery. Could anybody help me unlock the advanced options of my BIOS, please, because i think that in actual one some settings are on bad state, but i can't access to them.

LENOVO LEGION Y520-15IKBA
Model 80WY
BIOS: 5JCN25WW
link: [/url][url=https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/legion-series/legion-y520-15ikba/downloads/DS500033]https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/legion-series/legion-y520-15ikba/downloads/DS500033

Thanks in advance.