Hardware Maintenance Manual

•Theringindicator(RI)issignaledbyaserialdeviceoraPCCarddevice.
•Thetimesetontheresumetimerelapses.
Note:Thecomputerdoesnotacceptanyinputimmediatelyafteritenterssleepmode.Waitafew
secondsbeforetakinganyactiontoreenteroperationmode.
Hibernationmode
Inhibernationmode,thefollowingeventsoccur:
•Thesystemstatus,RAM,VRAM,andsetupdataarestoredontheharddisk.
•Thesystemispoweredoff.
Ifyouhavedefinedoneofthefollowingactionsastheeventthatcausesthesystemtogointohibernation
mode,performthataction.
•Closingthelid.
•Pressingthepowerbutton.
Also,thecomputergoesintohibernationmodeautomaticallyafteraperiodofinactivityspecifiedinpower
plansettings.
Whenthepoweristurnedon,thecomputerreturnsfromhibernationmodeandresumesoperation.The
hibernationfileinthebootrecordontheharddiskdriveisread,andsystemstatusisrestoredfromthe
harddiskdrive.
Wirelessoffmode
Inwirelessoffmode,thewirelessfeaturesareturnedofftoconservepower.Toturnofforturnonthe
wirelessfeatures,pressF8.
Symptom-to-FRUindex
Thissectioncontainsfollowinginformation:
•“Numericerrorcodes”onpage38
•“Errormessages”onpage39
•“No-beepsymptoms”onpage39
•“LCD-relatedsymptoms”onpage40
•“Intermittentproblems”onpage41
•“Undeterminedproblems”onpage41
Thesymptom-to-FRUindexinthissectionlistssymptomsanderrorsandtheirpossiblecauses.Themost
likelycauseislistedfirst,inboldfacetype.
Note:DotheFRUreplacementorotheractionsinthesequenceshowninthecolumnheaded“FRUor
action,insequence.”IfreplacingaFRUdoesnotsolvetheproblem,puttheoriginalpartbackinthe
computer.DonotreplaceanondefectiveFRU.
Thisindexcanalsohelpyoudetermine,duringregularservicing,whatFRUsarelikelytoneedtobe
replacednext.
AnumericerrorisdisplayedforeacherrordetectedinPOSTorsystemoperation.Inthedisplays,ncan
beanynumber.
Ifnonumericcodeisdisplayed,checkthenarrativedescriptionsofsymptoms.Ifthesymptomisnot
describedthere,goto“Intermittentproblems”onpage41
.
Chapter4.Relatedserviceinformation37