Lenovo ThinkServer RD550 - Page 173

Symptom
Action
Theamountofsystemmemorythatisdisplayedisless
thanthetotalcapacityoftheinstalledphysicalmemory
modulesandyoususpectamemorymoduleproblem.
1.Ensurethat:
•Allmemorymodulesarethecorrecttype
supportedbytheserver.See“Memorymodule
installationrules”onpage66
.
•Youfollowedthememorymoduleinstallation
rules.See“Memorymoduleinstallationrules”on
page66
.
•Allmemorymodulesareseatedcorrectlyand
securely.
•Thesystemfirmwareisup-to-date.
2.Reinstallthememorymodules.
3.Replacethesuspectmemorymodules.
4.(Trainedservicetechnicianonly)Replacethesystem
board.
Keyboard,mouse,andUSBdeviceproblems
Followthesuggestedactionsforthecorrespondingsymptomintheorderinwhichtheyarelisteduntilthe
problemissolved.Ifnoneoftheseactionssolvetheproblem,see“Troubleshootingprocedure”onpage155
forthesubsequentstepsyoushouldcheckafterusingtheinformationinthistopic.
Symptom
Action
Allorsomekeysonthekeyboarddonotwork.1.Ensurethat:
•TheUSBkeyboardcableissecurelyconnected
toaUSBconnectorontheserver.IftheUSB
keyboardisconnectedtoaUSBhub,disconnect
thekeyboardfromthehubandconnectitdirectly
totheserver.
•Nokeysarestuck.
•TheUSBcontrollerisenabledintheSetupUtility
program.See“UsingtheSetupUtilityprogram”
onpage47
.
2.Restarttheserver.
3.Replacethekeyboard.
Themouseorpointingdevicedoesnotwork.1.Ensurethat:
•Themouseorpointingdevicecableissecurely
connectedtotheserver.IftheUSBmouseor
pointingdeviceisconnectedtoaUSBhub,
disconnectthemouseorpointingdevicefromthe
hubandconnectitdirectlytotheserver.
•Themouseorpointingdeviceiscleanandnodust
accumulates.
•Thedevicedriversareinstalledcorrectly.
•TheUSBcontrollerisenabledintheSetupUtility
program.See“UsingtheSetupUtilityprogram”
onpage47
.
2.Restarttheserver.
Chapter7.Troubleshootinganddiagnostics159