Question No screen - windows didn't load correctly before it was showing cpu or ram changed CMOS memory cleared

[Rac114]

So I took out one of my ram stick to clean it but after placing it back it is showing CMOS memory cleared please enter setup or load default values then I tried many ways but there is no screen
Sometimes there is blue screen pops which says recovery - windows didn't load correctly
I am pretty sure my ram is not dead because in BIOS it showing its capacity and MHz and brand name and total ram in the system.
I have 8×2 ram sticks
I restarted on one but problem persists
It didn't boot just motherboard brand logo and then no signal
But when i entered in safe boot at least it showed password entry option but I didn't remember password and it is not accepting pin.

 

[Hassan _SK01]

I think your CMOS cell is weak. Maybe replacing it will resolve your issue