I have a MacBook Air A1466 that started acting strangely a few weeks ago. Sometimes the fan would run very loud for sometime and then it would run normally. The charger would show green instead of orange, even though it wasn't fully charged. Sometime it would not turn on. Now it won't turn on and there is no light on the charger. I have tried to reset the SMC, but this has not worked. What kind of hardware problem could I be facing and how to correctly diagnose. I/O Board, Battery etc. come to mind as possible problems. Thanks for any advice.