Lenovo ThinkCentre Edge 91 Hardware Maintenance Manual

DiagnosticErrorCodeFRU/Action
305-000-XXXMonitorDDCTestPassed
Noaction
305-250-XXXMonitorDDCselftestfailure1.RunSetuptoenableDDC
2.Cable
3.Monitor
4.Videocard
5.Systemboard
415-000-XXXModemTestPassedNoaction
415-XXX-XXXModemerrorRemovetheModemandre-testthesystem
Beepsymptoms
Beepsymptomsaretonesoraseriesoftonesseparatedbypauses(intervalswithoutsound)duringPOST.
Thefollowingtablesdescribesbeepsymptoms.
BeepSymptomFRU/Action
2shortbeepsCMOSsettingerror
Performthefollowingactionsinorder.
1.StarttheSetupUtilityprogramandpressF10to
Saveandexit.SeeChapter6“UsingtheSetupUtility
program”onpage43
.
2.StarttheSetupUtilityprogramandpressF9toload
defaultsandthenpressF10toSaveandexit.
3.PerformaBoot-blockrecovery.See“Recovering
fromaPOST/BIOSupdatefailure”onpage250.
3shortbeepsandthen1longbeepDRAMmemory
error
Performthefollowingactionsinorder.
1.Makesurethememorymodule(s)areproperlyseated
intheconnector(s).
2.Replacethememorymodule(s).
3.Replacethesystemboard.
POSTerrorcodes
Eachtimeyoupower-onthesystem,itperformsaseriesofteststhatchecktheoperationofthesystem
andsomeoptions.ThisseriesoftestsiscalledthePower-OnSelf-Test,orPOST.POSTdoesthefollowing
operations.
•Checkssomebasicsystem-boardoperations
•Checksthememoryoperation
•Startsthevideooperation
•Veriesthatthebootdriveisworking
IfthePOSTdetectsaproblem,anerrormessageappearsonthescreen.Asingleproblemcancauseseveral
errormessagestoappear.Whenyoucorrectthecauseofthersterrormessage,theothererrormessages
probablywillnotappearonthescreenthenexttimeyouturnonthesystem.
Chapter7.Symptom-to-FRUindex67

Lenovo ThinkCentre Edge 91 Specifications

General

Graphics	Integrated Intel HD Graphics or discrete AMD Radeon HD graphics options
Operating System	Windows 7 Professional
Form Factor	Tower
Ports	USB 2.0
Optical Drive	DVD-RW