Lenovo ThinkCentre M90p - Undetermined Problems

Message/SymptomFRU/Action
Flashingcursorwithanotherwiseblankdisplay.
1.SystemBoard
2.PrimaryHardDiskDrive
3.HardDiskDriveCable
IncorrectmemorysizeduringPOST
1.RuntheMemorytests
2.MemoryModule
3.SystemBoard
"InsertaDiskette"iconappearswithaknown-good
diagnosticsdisketteintherst3.5-inchdiskettedrive.
1.SystemBoard
2.DisketteDriveCable
3.NetworkAdapter
Intensityorcolorvariesfromlefttorightofcharacters
andcolorbars
1.Display
2.Videoadapter(ifpresent)
3.SystemBoard
Nopowerorfannotrunning
See“Harddiskdrivebooterror”onpage43
.
Non-systemdiskordiskerror-typemessagewitha
known-gooddiagnosticdiskette.
1.DisketteDrive
2.SystemBoard
3.DisketteDriveCable
Otherdisplaysymptomsnotlistedabove(includingblank
orillegibledisplay)
1.Display
2.SystemBoard
Power-onindicatororharddiskdrivein-uselightnoton,
butcomputerworkscorrectly
1.Powerswitch/LEDassembly
2.SystemBoard
Printerproblems1.Printer
2.SystemBoard
Programloadsfromtheharddiskwithaknown-good
diagnosticsdisketteintherst3.5-inchdiskettedrive
1.RuntheSetupandUtilityprogramandcheckStartup
sequence.
2.DisketteDrive
3.DisketteDriveCable
4.SystemBoard
5.AC/DCpoweradapter
PXEcomputercannotaccessprogramsfromitsownhard
disk.
Replacetheharddiskdrive
PXEcomputerdoesnotPXEfromserver
1.Checkstartupsequence
2.CheckthenetworkadapterLEDstatus
Someorallkeysonthekeyboarddonotwork
1.Keyboard
2.KeyboardCable
3.SystemBoard
Undeterminedproblems
Ifyouencounterundeterminedproblems,dothefollowing:
1.Turnoffthecomputerandthepower.
2.Removeordisconnectthefollowingcomponents(ifinstalled)oneatatime.
a.Externaldevices(modem,printer,ormouse)
64ThinkCentreHardwareMaintenanceManual