Keyboard stuck at "numpad" arrow keys , no numlock/Fn problem [Closed]

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Hello,

my laptop keyboard has no numeric keyboard (letters double up as those)

the numlock is turned off
the fn key is not stuck (F1 to F12 perform as those keys, not as functions)

BUT the keys that double up as numbers are stuck at the "numlock off" state of nornal numpads i.e. the "7" works as "home" , the "j" is the "1" and it works as "end", and so on.

as i said, the Fn is not stuck and the NumBlock is disabled

Notebook brand is RCA, but i think the keyboard yused is a lenovo