My MacBook Air (2013) won't turn on
This morning I was using it, and it was working fine. I came home this evening, plugged my MacBook into the MagSafe power adapter and went to power it on - and nothing happened. It is responding to the power adapter (ie lights up green initially and the orange) but I cannot get it to respond. At one stage I did hear a brief chime as if it was rebooting, but it cut off again.
I have tried everything I can find online - holding down the power button, holding down power, option and command, etc but nothing is working. I have only owned this laptop for a couple of months and I cannot think of anything that would have damaged it. As I say, it as working this morning.
I am desperate for help as I am currently abroad and not near an Apple Store and my laptop is essential for the work I am doing so any help would be greatly appreciated.
MacBook Air