2011 Macbook Air screen flickers like crazy when you raise/lower the lid. I understand some wires are loose around the silver surround of the lid effecting the screen. I think it will need a totally new lid part, should I take it to Apple to repair?...one high street repair business said Apple 'cap' its repair costs and would be cheaper than using an independent? Am anticipating a £300+ bill.... Anyone used Apple for a costly repair to an out of warranty laptop?