(((1))) I dualbooted elementary OS and GRUB took over 'bios' a month ago.(((2))) I formatted elementary os partitions and upgraded my 'bios' of G480 lenovo laptop to 62CN97WW(1.151). My 'bios' is back. Additionally, there was no GNOME Grub menu.(((3))) I installed Ubuntu to an old hard drive & it made my 'bios' dis-appeared again. (F2 to enter set-up leads to black screen, F12 to multi-boot still available; therefore, I clean installed windows 10 64 bit.) No Bios set up in f2,f1, Esc. And, choosing bios setup leads to window 10.(((4))) I installed Ubuntu 20.04 with uefi method and bios set up is gone. F1 leads to black screen, choosing bios setup with Lenovo Novo button leads to Ubuntu OS. Now, I log into my laptop by f12(multiboot).I tried boot repair 32 bit.This is pastebin link.https://pastebin.ubuntu.com/p/gBB2R7Mbmm/plain/
Help me recover my bios and GRUB menu.