IBM eServer 240 xSeries User Reference Manual

Also see for eServer 240 xSeries: Configuration and options guide

Contents

Power-on self test (POST) beep codesThe successful completion of POST is indicated by one beep and the appearanceof the first screen of your operating system or application program. More than onebeep indicates that POST detected an error.Beep codes are sounded in a series of beeps. For example, a 1–2–4 beep codesounds like one beep, a pause, two consecutive beeps, another pause, and fourmore consecutive beeps.POST beep code descriptionsThe following list contains more detailed descriptions of the possible types of beepsthat your server might emit.No beepsIf no beep occurs after your server successfully completes POST (that is,after the System POST Complete (OK) light on the operator informationpanel is illuminated), have the system serviced.Continuous beepThis indicates that your startup (boot) microprocessor has failed, or yoursystem board or speaker subsystem might contain a failing component. Ifthe system continues through POST with no errors, have the systemserviced. If no video appears, the startup microprocessor has failed; replacethe startup microprocessorNote: If the server has only one microprocessor installed, thatmicroprocessor is installed in microprocessor connector U5 and is thestartup (boot) microprocessor. If two microprocessors are installed,the microprocessor installed in U6 is the startup microprocessor andthe microprocessor installed in U5 is the application microprocessorOne short beepIf one beep occurs after your server successfully completes POST (that is,after the System POST Complete (OK) light on the operator informationpanel is illuminated), then POST has no configuration or functional errors toreport. One beep also occurs after your server completes POST if you enteran incorrect power-on password.Two short beepsThis beep combination indicates that POST encountered an error. TheConfiguration/Setup Utility program will display additional information; followthe instructions displayed. See “Power-on self-test (POST) messages” onpage 112 for explanations of any POST error messages.Three short beepsThis beep combination indicates a system memory error. This combinationoccurs only if the video BIOS cannot display the error message. Replacethe failing memory module.122 IBM xSeries User's Reference