Calling all Apple experts again!
My Macbook has sort of died! All I get is a grey screen with the Apple logo and a turning gear wheel. I've tried pressing command - option - P - R on start up and I've tried starting up in safe mode but nothing helps. After 5 mins of the grey screen the Macbook turns itself off. We've booked an appointment at Apple Southampton for Sunday but is there anything I can try in the meantime?