I switched on my MacBook Air and was browsing the net for just 5 minutes when suddenly it switched off. The battery was sitting at 95% so it wasn't an issue with the battery needing charged. I connected the power supply just in case but the light on the power supply remained green. I tried to switch my MacBook Air on but nothing. It wouldn't switch on which has made me think that my MacBook Air has died. I have had my MacBook Air since August 2011 so it looks like it's fit for the skip as it's out of warranty and I don't have the money to get it repaired. Please advise.