Apple laptop_ Specifikace stáhnout pdf (Strana 55)

55Chapter 4 Problem, Meet Solution

Â Ifyourecentlyinstalledadditionalmemory,makesurethatitiscorrectlyinstalledand

thatitiscompatiblewithyourcomputer.Seewhetherremovingitandreinstalling

theoldmemoryallowsthecomputertostartup(seepage46).

Â Pressthepower(®)buttonandimmediatelyholddowntheCommand(x),Option,

P,andRkeyssimultaneouslyuntilyouhearthestartupsoundasecondtime.This

resetstheparameterRAM(PRAM).

Â Ifyoustillcan’tstartupyourMacBook,see“LearningMore,Service,andSupport”on

page66forinformationaboutcontactingAppleforservice.

If the screen suddenly goes black or your MacBook freezes

TryrestartingyourMacBook.

1 UnpluganydevicesthatareconnectedtoyourMacBook,exceptthepoweradapter.

2 Pressthepower(®)buttontorestartthesystem.

3 Letthebatterychargetoatleast10percentbeforeplugginginanyexternaldevices

andresumingyourwork.

Toseehowmuchthebatteryhascharged,lookattheBattery( )statusiconinthe

menubar.

Thescreenmightalsodarkenifyouhaveenergysaverfeaturessetforthebattery.

If an audio device plugged into the audio port isn’t working

Unplugtheaudiodevice.ChooseApple()>SystemPreferences,andopenSound

preferences.IntheInputpane,specifywhetheryouwanttheporttobeusedforSound

InputorSoundOutput.Plugtheaudiodevicebackin.

Note: Ifyou’rerunningWindowsonyourMacBook,theportsupportsonlyaudiooutput.

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Apple laptop_ Specifikace Strana 55