•Ifanactionstepisprecededby'(Trainedtechnicianonly)',thatstepmustbeperformedonlybyaTrained
technician.
•GototheIBMsupportwebsiteathttp://www.lenovo.com/supporttocheckfortechnicalinformation,
hints,tips,andnewdevicedriversortosubmitarequestforinformation.
Table29.Serialportproblemsandactions
SymptomAction
Thenumberofserialportsthat
areidentifiedbytheoperating
systemislessthanthenumber
ofinstalledserialports.
1.Makesurethat:
•EachportisassignedauniqueaddressintheSetuputilityandnoneofthe
serialportsisdisabled.
•Theserial-portadapter(ifoneispresent)isseatedcorrectly.
2.Reseattheserialportadapter.
3.Replacetheserialportadapter.
Aserialdevicedoesnotwork.1.Makesurethat:
•Thedeviceiscompatiblewiththeserver.
•Theserialportisenabledandisassignedauniqueaddress.
•Thedeviceisconnectedtothecorrectconnector.
2.Reseatthefollowingcomponents:
a.Failingserialdevice
b.Serialcable
3.Replacethefollowingcomponentsoneatatime,intheordershown,restarting
theservereachtime:
a.Failingserialdevice
b.Serialcable
c.(Trainedtechnicianonly)Systemboard
Theserialportmightprintout
somemessagesfordebugging
purposesduringtheuEFIand
pDSAconfigurationstages.
Someexternaldeviceswhen
attachedontheserialportcan
causespecificdevice-related
behaviors.
1.IntheuEFIconsoleredirectionpage,disabletheserialportsettingtostop
messagesfrombeingprintedoutviatheserialport.
ServerGuideproblems
•FollowthesuggestedactionsintheorderinwhichtheyarelistedintheActioncolumnuntiltheproblemis
solved.
•Ifanactionstepisprecededby'(Trainedtechnicianonly)',thatstepmustbeperformedonlybyaTrained
technician.
•GototheIBMsupportwebsiteathttp://www.lenovo.com/supporttocheckfortechnicalinformation,
hints,tips,andnewdevicedriversortosubmitarequestforinformation.
158Systemx3500M4InstallationandServiceGuide