So I bought a used 2006 MacBook Pro. It was working fine until one day I shut it down and now it won't boot at all. I bought it to fix and give to a friend but I can't get it to boot! The charger light switches from green to orange constantly but still never charges at all. I've tried just plugging it in and turing it on without the battery to make sure that wasn't the problem and it still didn't work. Any help would be appreciated! Thanks!