I had a friend find a macbook pro 13inch early 2011 in the trash. It starts up sometimes. Here are the clues: When I connect the hdd and turn it on, the screen is black but the apple chime sounds, slowly, eventually the screen turns to blank white, then boot screen appears after 1 minute It has frozen at the point of the loading wheel, but more often loads all the way. A full startup takes about 4 minutes. After loading all the way it works fine but freezes occasionally requiring a restart. The keyboard backlight doesn't turn on until the OS has loaded When I disconnected the hard drive and turn the computer on, the fan runs really high, full blast until it is unplugged or turned off I have a bad feeling that this is a logic board problem. If someone has a feeling as to what part of the logic board these problems might be caused by, that would be helpful. Best case scenario, I hope this to be a problem with one part of the logic board so that I could replace that part.