Hi! A week ago, my macbook air notebook was sent in for repair and the battery and fan was replaced. Yesterday, I noticed that when the notebook was left idle at a webpage, it shut down and I had to press the power button for at least 10 to 15 seconds for it to turn on again. When the notebook turned on, the website came up again. Today, the notebook would not turn on at all until I connected it to an electrical outlet. I also want to add that so far, it has taken four hours for the notebook to go from 43 % to 54 % as far as recharging goes. I had spoken to several apple tech support specialists and was told it might be a logic board issue. Could it be the logic board or perhaps the power supply part in the notebook? I appreciate any feedback/comments on this issue! Thanks!