87Chapter 4 Problem, Meet Solution
Problems with a Display
NOTICE: IfyouhaveaproblemwithanAppledisplayandnothinginthismanual
solvesit,contactanAppleAuthorizedServiceProviderorAppleforassistance.Ifyou
attempttorepairthedisplayyourself,anydamageyoumaycausetothedisplaywill
notbecoveredbythelimitedwarrantyonyourdisplay.ContactanAppleAuthorized
ResellerorAppleAuthorizedServiceProviderforadditionalinformationaboutthisor
anyotherwarrantyquestion.
If no image appears on the screen
 Makesurethecomputeristurnedon,andifthedisplayhasapowerbutton,make
sureit’sturnedon.
 Makesurethecablesareconnectedproperlytoyourcomputerandthedisplay.
 Ifyourgraphicscardhasaninternalpowercable,makesureit’sconnectedtothe
cardandthelogicboard.
 Makesureyourcomputerisnotinsleep.Pressthepowerbuttonoranykeytoseeif
thecomputerwakes.
 Makesurethedisplaybrightnessandcontrastaresetproperly.Usethebrightness
keysontheAppleKeyboard.Somedisplayshavebrightnessandcontrastcontrolson
orundertheirfrontedgeorontheside.
 ResetthePRAMbyrestartingthecomputerwhileholdingdowntheCommand(x),
Option,P,andRkeysuntilyouhearthestartupsoundasecondtime.
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