Apple Mac Pro Mac Pro Specifiche Scaricare il pdf (Pagina 52)

52 Chapter 4 Problem, Meet Solution

If your MacBook Pro freezes during startup, or you see a ashing question mark,

or the screen is dark and the sleep indicator light is glowing steadily (not in sleep)

Theashingquestionmarkusuallymeansthatthecomputercan’tndthesystem

softwareontheharddiskoranydisksattachedtothecomputer.

Â Waitafewseconds.Ifthecomputerdoesn’tsoonstartup,shutitdownbypressing

andholdingthepower(®)buttonforabout8to10seconds.Disconnectallexternal

peripheralsandtryrestartingbypressingthepower(®)buttonwhileholdingdown

theOptionkey.Whenyourcomputerstartsup,clicktheharddiskicon,andthen

clicktherightarrow.Afterthecomputerstartsup,openSystemPreferencesandclick

StartupDisk.SelectalocalMacOSXSystemfolder.

Iftheproblemoccursfrequently,youmightneedtoreinstallyourcomputer’ssystem

software.See“Repairing,Restoring,orReinstallingMacOSXSoftware”onpage54.

If your MacBook Pro doesn’t turn on or start up

Trythefollowingsuggestionsinorderuntilyourcomputerturnson:

Â Makesurethepoweradapterispluggedintothecomputerandintoafunctioning

poweroutlet.Besuretousethe85WMagSafePowerAdapterthatcamewithyour

MacBookPro.Ifthepoweradapterstopschargingandyoudon’tseetheindicator

lightontheMagSafeconnectorturnonwhenyoupluginthepowercord,try

unpluggingandrepluggingthepowercordtoreseatit,ortryanotherpoweroutlet.

Â Checkwhetherthebatteryneedstoberecharged.Pressthesmallbuttonontheleft

sideofyourcomputer.Youshouldseeonetoeightlightsindicatingthebattery’s

levelofcharge.Ifasingleindicatorlightison,connectyourpoweradapterto

recharge.Formoreinformationaboutbatteryindicatorlights,seepage54.

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Apple Mac Pro Mac Pro Specifiche Pagina 52