I'm new here and I really need the expertise of everyone TIA. My son had a Macbook that suffered spill of soda a year and a half ago which I brought to Apple for repair and said it is beyond repair. So i bought him a new one and forget the damaged macbook and put in the storage. Just last week my son just out of the blue plug the old macbook and it boot up with no problem, everything seems to be working fine. I used it for several hours everyday and worked fine except when i shut it down it won't boot up again, I have to wait the next day when it cools down and it will boot again like nothing happens. What should i do to fix this. Thanks for your help.