Lost key function

>-----Original Message-----
>I seem to lost te 7t and 8t letters of alpabet as well
as
>punctuation and backspace key. Do I need to brin it
into
>store to fix? I re-installed software but did not fix
>problem.
>.
>if this is on a laptop, it may be your battery. I have
had all sorts of trouble with my keys. The keyboard and
been replaced twice and the mother board once. I turned
out to be the battery.