Hi, I've a 2008 MBP and when I shut the lid it crashes. Not straight away, but at some point later or during the night. By crash, I mean the first thing I notice is that the fans are running. If I open the lid I can't wake it. I have to turn it off to restart it. It started the day I installed Yosemite. I originally thought it was time machine, but I've turned that off. I've turned off Dropbox, FLux too. I don't think I have anything else running like that. I've shut down all applications and it still happens virtually every time. It doesn't get a lot of use so I haven't the enthusiasm to go through a clean install. Any ideas?