Apple Mac Pro - Page 88

88 Chapter 4 Problem, Meet Solution
If the screen image appears dim or ickers
Â Adjustthedisplaybrightnessandcontrastsettings.Usethebrightnesskeysonthe
AppleKeyboard.Somedisplaysalsohavebrightnessandcontrastcontrolsonor
undertheirfrontedge.Oryoumaybeabletoadjustbrightnessorcontrastusingthe
DisplayspaneofSystemPreferences.
Â CalibratethedisplaybychoosingApple()>SystemPreferences.ClickDisplays,
selectColor,andclickCalibrate.Formoreinformationaboutcolorandyourdisplay,
seeHelpCenter.
Â Theickeringmaybecausedbyinterferencefromanearbypowerline,auorescent
light,oranelectricaldevice—forexample,aradio,amicrowaveoven,oranother
computer.Tryrelocatingnearbyelectricaldevicesormovingyourcomputeranddisplay.
If no colors appear on the screen or the colors don’t look right
Â Makesurethedisplayisconnectedrmlytothecomputer.
Â Calibratethedisplay,asdescribedin“Ifthescreenimageappearsdimorickers”on
page88.
If desktop icons move when you change the screen resolution
Changingthescreenresolutionaectsthedisplayofinformationonyourscreen.
Theoperatingsystemmayrepositioniconswhenyouchangethescreenresolution.
If the screen freezes
Â Forcethefrozenapplicationtoquit.HolddowntheCommandkey(x)andOption
keyandpressEsc.ThenselecttheapplicationinthelistandclickForceQuit.
Â Ifthatdoesn’twork,forcethecomputertorestartbyholdingdownthepowerbutton
(®)for5or6secondsuntilyourMacProshutsdown.Pressthepowerbutton(®)
againtostartupyourMacPro.