schwarzennegger said:
Thank you so much again for reply,

i am not expert, yes i ma comfortable working inside the laptop,done quite lot of times.

I did all the stuff you mentioned, hard drive removal, BIOS battery, replacing bios battery, removing ram, hard drive etc.

only thing which i done yet is the HARD RESET OF BIOS you have mentioned in the link!

As you mentioned have to find a way of getting in to the BIOS.

Guess what ,my spare laptop Lenovo 910 doing the exact thing now after i spilled a splash of water!! End of lockdown i will be mad soon!

I don't what happened, but i tried to enter in to Bios today!!! It worked!! Thank you all you for helping .