For some reason when I type certain keys, random letters/symbols will appear. It is sometimes fixed after powering down, yet will come back later. The keys affected are "7" "u" and "j" (I copied and pasted them). Typing parentheses also makes caps lock sometimes. Here is what happens when I repeatedly press those keys: 7 - 1121123123456112312345612341234512341234 u - IOTUYeqrtwyIORTUYIORTUYeqrwIOUeqrwqwIOTU j - adfs∆˚¬adfgsadsadsadfgsadfsadfgs˙∆˚¬as Please help!