Lenovo C355 All-in-One Bedienungsanleitung PDF herunterladen (Seite 26)

POSTerrorcodes

Eachtimeyouturnthecomputeron,itperformsaseriesofteststocheckthatthesystemisoperating

correctlyandthatcertainoptionsareset.ThisseriesoftestsiscalledthePower-OnSelf-Test,orPOST.

POSTdoesthefollowing:

•Checkssomebasicmotherboardoperations

•Checksthatthememoryisworkingcorrectly

•Startsvideooperations

•Veriesthatthebootdriveisworking

POSTErrorMessageDescription/Action

Keyboarderror

Cannotinitializethekeyboard.Makesurethekeyboard

isproperlyconnectedtothecomputerandthatnokeys

areheldpressedduringPOST.Topurposelycongure

thecomputerwithoutakeyboard,selectKeyboardless

operationinStartupandsettheoptiontoEnabled.The

BIOSthenignoresthemissingkeyboardduringPOST.

RebootandSelectproperBootdeviceorInsertBoot

MediainselectedBootdevice

TheBIOSwasunabletondasuitablebootdevice.Make

surethebootdriveisproperlyconnectedtothecomputer.

Makesureyouhavebootablemediainthebootdevice.

Undeterminedproblems

1.Power-offthecomputer.

2.Removeordisconnectthefollowingcomponents(ifconnectedorinstalled)oneatatime.

a.Externaldevices(modem,printer,ormouse)

b.Extendedvideomemory

c.ExternalCache

d.ExternalCacheRAM

e.Harddiskdrive

f.Diskdrive

3.Power-onthecomputertore-testthesystem.

4.Repeatsteps1through3untilyoundthefailingdeviceorcomponent.

Ifalldevicesandcomponentshavebeenremovedandtheproblemcontinues,replacethesystemboard.

20LenovoC355/C455All-In-OneComputerHardwareMaintenanceManual

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Lenovo C355 All-in-One Bedienungsanleitung Seite 26