Why does keyboard type numbers instead of letters? can bios fix this?

i hooked my laptop up to the tv prior to that my keyboard was fine now that i have a new router i'd like to use the laptop for what it is used for but now certain letters m,j,k,l and i all type numbers instead of the letter it represents. how can i fix this i've tried num/lk and fn keys and to no avail. would bios fix this when booting if so how do i do it?