My MacBook Air won't turn on?

After working completely fine one day, my macbook air suddenly refuses to turn on. The charger light is orange and works fine, I tried an SMC reset and the charger changes to green for a second then reverts to orange as expected. I have also tried disconnecting the battery and then reconnecting. I have also tried holding the power in for 10 then plugging in the charger while holding the power button. Nothing seems to work!! I really appreciate the help and thank you very much in advance.