49Chapter 4 Problem, Meet Solution
If your iMac won’t turn on or start up
ÂMakesurethepowercordispluggedintoyouriMacandafunctioningpoweroutlet.
ÂRestart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.
ÂPress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).
ÂIf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).
ÂUnplug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.
ÂIf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
ÂUsingacontinuousmotion,pushthediscintothedriveuntilyourngerstouchthe
edgeofyouriMac.
ÂUseonlyastandard-sizedisc.