Apple Mac Pro - Display Issues

87Chapter 4 Problem, Meet Solution
Problems with a Display
NOTICE: IfyouhaveaproblemwithanAppledisplayandnothinginthismanual
solvesit,contactanAppleAuthorizedServiceProviderorAppleforassistance.Ifyou
attempttorepairthedisplayyourself,anydamageyoumaycausetothedisplaywill
notbecoveredbythelimitedwarrantyonyourdisplay.ContactanAppleAuthorized
ResellerorAppleAuthorizedServiceProviderforadditionalinformationaboutthisor
anyotherwarrantyquestion.
If no image appears on the screen
Â Makesurethecomputeristurnedon,andifthedisplayhasapowerbutton,make
sureit’sturnedon.
Â Makesurethecablesareconnectedproperlytoyourcomputerandthedisplay.
Â Ifyourgraphicscardhasaninternalpowercable,makesureit’sconnectedtothe
cardandthelogicboard.
Â Makesureyourcomputerisnotinsleep.Pressthepowerbuttonoranykeytoseeif
thecomputerwakes.
Â Makesurethedisplaybrightnessandcontrastaresetproperly.Usethebrightness
keysontheAppleKeyboard.Somedisplayshavebrightnessandcontrastcontrolson
orundertheirfrontedgeorontheside.
Â ResetthePRAMbyrestartingthecomputerwhileholdingdowntheCommand(x),
Option,P,andRkeysuntilyouhearthestartupsoundasecondtime.