oh dear... i have the same prob, and my toddler son did it too!!!!!!!!! The keyboard seemed locked. I can only press A, a , 1 ...
when i type k, it functions like a tab, that skips spaces to the right.
when i press s, it keeps showing sD sD sD
when i press q, is shows Q:sd66
and all those shift 5x, numberlock, Fn+F6 etc... i have done them, nothing works!