I notice today that of the 2 fans in my MBP is only the left one that is working... is that OK? the 2 should be working simultaneously? Or the right one start working when if needed?... Where I could fin a good step by step "How to open a MBP" guide? Where I could buy a replacement (Just in case). I have a friend that has a MacBook and he open it up and just blow the fan and just start working. I'll try that. But just in case doesn't work I'll buy a replacement. I'll Appreciate any help.. Thanks.