Hey everyone, I recently purchased a 2.4 GHz 15" MBP. As of Monday night, it hasn't been starting up. It goes to the white screen with the gray Apple and the loading wheel starts turning, but then it turns off. I've tried all the recommended fixes from apple.com (resetting the PRAM, resetting the Power Manager, etc.). I also ran the Disk Utility from the OSX Install Disc and when I ran a repair, I got this message: "Invalid sibling link. Volume check failed. Error: the underlying task reported failure on exit" One thing which I think might have caused the problem is the external hard drive which I use. It's a 500 GB My Book from Western Digital. Once, I believe I left it hooked up to my MBP while the MBP went into sleep mode. When I came back to the MBP, a message said I had improperly removed an external device which may have caused an error. Also, I recently synced my iPhone with the MBP and updated to 10.4.10. Is there anything I can do (besides setting up an appointment at the Genius Bar)? Thanks for your help!