Computer Hardware User Manual

4.Verifythatyouareusingaworkingacpoweroutlet.Pluganotherdeviceintotheoutletorcontactthe
powercompanyorsuppliertoverifythattheoutletisworkingcorrectly.
5.Checkthepowercordcontinuity.
6.Replacetheac/dcpoweradapter.
7.Verifythatthepowercordoftheac/dcpoweradapteriscorrectlyconnectedtothecomputer.See
“Locatingconnectorsontherearofyourcomputer”onpage65
.
8.Removingthecomputercover.See“Removingthecomputercover”onpage68.
9.Checkthepowerswitch/LEDassemblyconnectoronthesystemboard.See“Locatingpartsonthe
systemboard”onpage67
.Reseatthecablefromthepowerswitch/LEDassemblytothesystemboard.
10.Replacethepowerswitch/LEDassembly.
11.Replacethesystemboard.See“Replacingthesystemboard”onpage82.
Problemdeterminationtips
Duetothevarietyofhardwareandsoftwarecombinationsthatcanbeencountered,usethefollowing
informationtohelpyouonproblemdetermination.Ifpossible,havethisinformationavailablewhen
requestingassistancefromServiceSupportandEngineeringfunctions.
•Machinetypeandmodel
•Microprocessororharddiskdriveupgrades
•Failuresymptom
–Dodiagnosticsindicateafailure?
–What,when,where,single,ormultiplesystems?
–Isthefailurerepeatable?
–Hasthiscongurationeverworked?
–Ifithasbeenworking,whatchangesweremadepriortoitfailing?
–Isthistheoriginalreportedfailure?
•Diagnosticsversion
–Typeandversionlevel
•Hardwareconguration
–Print(printscreen)congurationcurrentlyinuse
–BIOSlevel
•Operatingsystemsoftware
–Typeandversionlevel
Notes:Toeliminateconfusion,identicalsystemsareconsideredidenticalonlyifthey:
1.Aretheexactmachinetypeandmodels
2.HavethesameBIOSlevel
3.Havethesameadapters/attachmentsinthesamelocations
4.Havethesameaddressjumpers/terminators/cabling
5.Havethesamesoftwareversionsandlevels
6.HavethesameDiagnosticdiskettes(version)
7.Havethesamecongurationoptionssetinthesystem
8.Havethesamesetupfortheoperating-system-controlledles
34HardwareMaintenanceManual