Hello, This afternoon the keys v, f, r, 4, ], and the return key on my MacBook air (Mid 2012, 1.8 GHz Intel Core i5 processor) stopped working properly. When pressed, these keys sometimes produce nothing and at other times produce a group of seemingly random letters. Pressing the v key multiple times minimizes the window I am currently working in. Pressing the return key sometimes deletes the text I have written. In addition, the character g is spontaneously produced when I am trying to type without my touching the g key. This problem appeared to have begun randomly. I used the computer in the morning with no problems. When I used the computer again in the afternoon, the keys no longer worked as they normally do. Nothing abnormal happened to it between those two times. I verified and repaired the disk and its permissions using disk utility after I noticed the problem. Nothing changed after the repair and restart. I also updated my operating system to the newest update in the app store and restarted, but nothing changed. What else can I try to solve this problem, other than sending the MacBook air out for repair?