IBM 8841 - eServer xSeries 236 Installation Manual

Also see for 8841 - eServer xSeries 236: Option installation guide

Contents

Memory problemsSymptom Suggested actionThe amount of system memorythat is displayed is less than theamount of installed physicalmemory.Make sure that:v The DIMMs are seated correctly.v You have installed the correct type of memory.v If you changed the memory, you updated the memory configuration in theConfiguration/Setup Utility program.v All banks of memory are enabled. The server might have automatically disableda memory bank when it detected a problem, or a memory bank might have beenmanually disabled.Check the POST error log for error message 289:v If the DIMM was disabled by a system-management interrupt (SMI), replace theDIMM.v If the DIMM was disabled by the user or by POST, run the Configuration/SetupUtility program and enable the DIMM.v If this error remains, replace the DIMM.If the problem remains, call for service.Microprocessor problemsSymptom Suggested actionThe server emits a continuoustone during POST.The startup (boot) microprocessor is not working correctly. Make sure that thestartup microprocessor is seated correctly. If it is, replace the startupmicroprocessor.If the problem remains, call for service.Monitor problemsSome IBM monitors have their own self-tests. If you suspect a problem with yourmonitor, see the information that comes with the monitor for instructions for testingand adjusting the monitor. If you cannot diagnose the problem, call for service.Symptom Suggested actionThe screen is blank. Make sure that:v The server power cord is connected to the server and a working electrical outlet.v The monitor cables are connected correctly.v The monitor is turned on and the brightness and contrast controls are adjustedcorrectly.Important: In some memory configurations, the 3-3-3 beep code might soundduring POST, followed by a blank monitor screen. If this occurs and the Boot FailCount feature in the Start Options of the Configuration/Setup Utility program isenabled (its default setting), you must restart the server three times to force theBIOS to reset the configuration settings to the default configuration (the memoryconnector or bank of connectors enabled).If the problem remains, call for service.Only the cursor appears. Call for service.The monitor works when youturn on the server, but thescreen goes blank when youstart some applicationprograms.Make sure that:v The monitor cable is connected.v You have installed the necessary device drivers for the application programs.If the problem remains, call for service.48 IBM xSeries 236 Type 8841: Installation Guide