Apple MC812LL/A Personal Computer User Manual


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49Chapter 4 Problem, Meet Solution
If your iMac won’t turn on or start up
 MakesurethepowercordispluggedintoyouriMacandafunctioningpoweroutlet.
 RestartyourcomputerwhileholdingdowntheCommand(x)andRkeys,untilthe
computerrestarts.WhentheMacOSXUtilitiespaneapears,selectanoptiontorepair
yourdisk,restoreyoursoftware,orreinstallMacOSXandAppleapplications.For
moreinformation,see“Repairing,Restoring,orReinstallingMacOSXSoftware”on
page50.
 Pressthepowerbutton(®)andimmediatelyholddowntheCommand(x),
Option,P,andRkeysuntilyouhearthestartupsoundasecondtime.Thisresetsthe
parameterRAM(PRAM).
 Ifyourecentlyinstalledmemory,andyouriMacsoundstoneseveryveseconds,
makesurethatthememoryiscorrectlyinstalledandthatitiscompatiblewithyour
iMac.CheckwhetherremovingthememoryyouinstalledallowsyouriMactostart
up(seepage44).
 Unplugthepowercordandwaitatleast30seconds.Plugthepowercordinagain
andpressthepowerbutton(®)tostartupyouriMac.
 Ifyoustillcan’tstartupyouriMac,see“LearningMore,Service,andSupport”on
page62forinformationaboutcontactingAppleforservice.
If you have trouble inserting a disc
 Usingacontinuousmotion,pushthediscintothedriveuntilyourngerstouchthe
edgeofyouriMac.
 Useonlyastandard-sizedisc.
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