After cleaning my MacBook Pro with a alcohol cloth (same ones sold for use to clean eye glasses), the keys are not working when I try to log in with my main/usual name & passwd. BUT, I clicked on a button below that says "Sign in as a different user?" SO I CLICK IT, and it clears out my default username and allows me to type another user ID and Password...and works. So I know that I haven't broke the keyboard...but I've obviously set it into a select mode by pushing on the 'fn' or 'cmd' or 'F2-F12' keys.
If anyone is aware of a game mode or other kind of mode and know how to fix this, I would be greatly appreciate it.