Lenovo H515s Desktop Manuel d'utilisateur télécharger pdf (Page 26)

POSTerrorcodes

Eachtimeyouturnthecomputeron,itperformsaseriesofteststocheckthatthesystemisoperating

correctlyandthatcertainoptionsareset.ThisseriesoftestsiscalledthePower-OnSelf-Test,orPOST.

POSTdoesthefollowing:

•Checkssomebasicsystem-boardoperations

•Checksthatthememoryisworkingcorrectly

•Startsvideooperations

•Veriesthatthebootdriveisworking

POSTErrorMessageDescription/Action

Keyboarderror

Cannotinitializethekeyboard.Makesurethekeyboard

isproperlyconnectedtothecomputerandthatnokeys

areheldpressedduringPOST.Topurposelycongure

thecomputerwithoutakeyboard,selectKeyboardless

operationinStartupoptiontoEnabled.TheBIOSthen

ignoresthemissingkeyboardduringPOST.

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.

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Lenovo H515s Desktop Manuel d'utilisateur Page 26