Lenovo ThinkCentre E73z - Undetermined Problems

Message/SymptomFRU/Action
Serialorparallelportdevicefailure(adapterport)1.ExternalDeviceSelf-TestOK?
2.ExternalDevice
3.Cable
4.AlternateAdapter
5.SystemBoard
Someorallkeysonthekeyboarddonotwork
1.Keyboard
2.KeyboardCable
3.SystemBoard
Undeterminedproblems
Thissectionprovidesinstructionsonhowtondoutthefailingdevicesoradapters.
1.Power-offthecomputer.
2.Removeordisconnectthefollowingcomponents(ifinstalled)oneatatime.
a.Externaldevices(modem,printer,ormouse)
b.Anyadapters
c.Memorymodules
d.Extendedvideomemory
e.ExternalCache
f.ExternalCacheRAM
g.Harddiskdrive
h.Diskettedrive
3.Power-onthecomputertore-testthesystem.
4.Repeatsteps1through3untilyoundthefailingdeviceoradapter.
Ifalldevicesandadaptershavebeenremoved,andtheproblemcontinues,replacethesystemboard.
Chapter7.Symptom-to-FRUIndex63