Owner's manual

89Chapter 4 Problem, Meet Solution
If your display has a light on the front and it’s ashing
OnsomeAppleatpaneldisplays,thepowerlightdisplaysaseriesofshortashes
whenanerrorisdetected.
Â If you see a repeating sequence of three short ashes,thedisplayisdetectinginputin
thewrongvideoformat.Makesureyourdisplayiscompatiblewithyourgraphics
cardandthatyou’veinstalledthecorrectdisplaysoftware,ifyourdisplaycamewith
installationsoftware.
Â If you see a sequence of two short ashes and a long ash,thedisplayisdetectinga
problemwithabacklightinglamp.ContactanAppleAuthorizedResellerorApple
AuthorizedServiceProvider.
Problems with Your Internet Connection
IfyouhavetroublewithyourInternetconnection,youcantrythestepsinthissection
startingwithNetworkDiagnostics.
To use Network Diagnostics:
1 ChooseApple()>SystemPreferences.
2 ClickNetworkandthenclick“Assistme”atthebottomofthepage.
3 ClickDiagnosticstoopenNetworkDiagnostics.
4 Followtheonscreeninstructions.
IfNetworkDiagnosticscan’tresolvetheproblem,theremaybeaproblemwiththe
Internetserviceprovider(ISP)youaretryingtoconnectto,withanexternaldeviceyou
areusingtoconnecttoyourISP,orwiththeserveryouaretryingtoaccess.Youcan
alsotrythestepsinthefollowingsection.