I got a laptop here and it works fine except the keyboard. The
1,2,q,w,a,s,z,x,tab,Left shift all double when you press them and
sometimes give the letter next to them too. Such as when I press the
"A" button I get an output of "as" or "sa" . Or press the "z" key I
get "zx" or "xz" and I tried blowing them out air with no result. What
could cause this. Trash under the keys or something?