原帖由： nomodo4u ,
Maybe one of these tips will work for ya: -Take the RAM out and try re-seating it. -Replace the RAM with working RAM -Reset PRAM -Try booting up with the power cord plugged in and battery installed -Try booting up with power cord unplugged and just battery installed -Try booting up with power cord plugged in and battery taken out -Get a firewire cord and plug your MacPro into the dead Macbook and boot the Macbook in Target disk mode. Then on your MacPro go into Disk Utilities and repair disk permissions and repair disk on the Macbook hard drive. Then power down both computers and power up the Macbook and see if that works. -Replace the hard drive with a good working hard drive and operating system.