I am not sure if laptops have a clear CMOS jumper or not.
I havent had that many in pieces.
A jumper is a small plastic part, not much bigger than a match head.
Usually black but can be other colours.
They just have a small piece of copper inside that makes a connection between two pins.
The CMOS one has two positions, position 1 connects pins 1 and 2 together for the normal running and switching the jumper to connect pins 2 and 3 shorts out the memory in the CMOS and loads its default settings.
The jumper then has to be replaced in the normal run position and the pc restarted.
This sometimes helps if the CMOS has somehow got currupted or if someone has altered the settings in such a way that it stops the pc booting.
As I said laptops dont always use the same setup as desktops and I am not sure if they even have a clear CMOS jumper.