IBM 7985 Problem Determination And Service Manual

Note: The BMC system event log, which you can view through theConfiguration/Setup Utility program, also contains several information, warning, anderror messages.In the following example, the system event/error log message indicates that theserver was turned on at the recorded time.- - - - - - - - - - - - - - - - - - - - -Date/Time: 2002/05/07 15:52:03DMI Type:Source: SERVPROCError Code: System Complex Powered UpError Code:Error Data:Error Data:- - - - - - - - - - - - - - - - - - - - -The following table describes the possible system-error log messages andsuggested actions to correct the detected problems.v Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 4, “Parts listing, System x3655, Type 7985 and 7943,” on page 93 to determine whichcomponents are customer replaceable units (CRU) and which components are field replaceable units(FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.System event/error log message Action+12V critical over voltage fault 1. If the OVER SPEC LED on the light path diagnostics panel islit, or any of the four power channel error LEDs (A, B, C, or D)on the system board are lit, see the entries aboutpower-channel error LEDs in “Power problems” on page 46.(See “System-board LEDs” on page 17).2. If the actions in “Power problems” on page 46do not identify adefective component, complete the following steps:a. Remove the power supplies. Replace the power suppliesone at a time, restarting the server each time, to isolate afailing power supply.b. If the server fails to start, replace the power backplane.Restart the server.c. If the server fails to start, (trained service technician only)replace the system board.+12V critical under voltage fault 1. If the OVER SPEC LED on the light path diagnostics panel islit, or any of the four power channel error LEDs (A, B, C, or D)on the system board are lit, see the entries aboutpower-channel error LEDs in “Power problems” on page 46.(See “System-board LEDs” on page 17).2. If the actions in “Power problems” on page 46do not identify adefective component, complete the following steps:a. Remove the power supplies. Replace the power suppliesone at a time, restarting the server each time, to isolate afailing power supply.b. If the server fails to start, replace the power backplane.Restart the server.c. If the server fails to start, (trained service technician only)replace the system board.Chapter 3. Diagnostics 69