Hello, I have a Macbook Air Late 2010 (a1369) with a strange issue.... If i shutdown normally it dont boot anymore, i have to disconnect magsafe and internal battery for 3-4 hours and after that it starts again normally and i can use it. No issue if i put it to sleep or restart, only if a shutdown. I already tryed to shutdown and reset PRAM, SMC no way. It only work if a remove battery and let it for about 3-4 hours.... Any idea? I passed on a Apple repair but with my luck this model is "vintage".... so no parts from them.... Please i need help.. 