I turned on my Macbook air and the screen was fine until the grey colour of the login screen appeared. After that a horizontal line appeared at about the 3/4 of the display. I had some coffe spilled on it a week ago or so (7-8 drops but enough to mess up the keyboard somehow:/), but this was really sudden and I don't think it is related to that. The service guys at a local retailer said is a screen problem and needs replacing.:/ Has this happened to anyone? You think it may be the connector or something else instead of the actual lcd?