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Оригинальный сообщение: mister790 ,


Just a few suggestions for further troubleshooting steps (in the desperate hope that it's not a logic board issue):

First, have you tried resetting the SMC?  Directions at http://support.apple.com/kb/HT1411

Second, to eliminate the possibility of software issues, have you tried restarting the computer from an external hard drive to see if the issue persists?

Finally, I know you've tried your current power cable on other computers, but have you tried a different power cable on the problem computer?