I believe the CMOS battery is under the board, although I am not sure if clearing the CMOS will work. https://download.lenovo.com/consumer/mobiles_pub/ideapad_110-14_15ibr_15acl_touch-15acl_hmm_201608.pdf

Have you tried powering it off and pressing the OneKey Recovery button next to the HDMI port? You might need a sim tool or paperclip to press it. https://support.lenovo.com/us/en/solutions/ht104038-where-can-i-find-the-onekey-recovery-novo-button-on-ideapad-laptops