My father macbook (not under warranty) is acting weirdly. Some of the key (like the a, q, delete key and two other) when press it respond with weird symbol. All the other buttom work just find. I try to hold and press a lot of other buttom but nothing working. I connect the backbook to an external Laptop Keyboard and thos button work fine. Does anyone know what wrong with it or how can I fix it. If I need to bring it ot an professional (not apple since it cost so much) how much would it cost to fix it. Thank you