H132024:  174 POST ERROR AND MICROPROCESSOR ERROR IN DIAGNOSTIC


 TEXT:

 174 POST Error and Microprocessor Error in Diagnostic

 SYMPTOM:

 Customer will see a 174 error at POST. Reference disk will
 display 0 MHz for the processor speed. Diagnostics when ran will
 display the following error:

 (slot =0, server 85 system board... error code = 00015400, a
 microprocessor error occurred at test step 115, most likely
 causes are Microprocessor, or system board)

 PROBLEM ISOLATION AIDS:

 - The system is a PS/2 server, Type 9585, any Model.

 - The system is configured with one (1) PODP5V83  Pentium
   Overdrive processor.

 - Error codes displayed: 174 POST, 15400 on diagnostics

 - Exact error message: (slot =0, server 85 system board...
   error code = 00015400, a Microprocessor error occurred at
   test step 115, most likely causes are Microprocessor, or
   system board)

 - Diagnostics fails.

 - Diagnostics affected (version): v1.3

 - BIOS levels affected: v1.11

 - Upgrade procedures that must be followed:

 Customer must first Contact The IBM HelpCenter at
 1 800-772-2227, to order the required socket interposer. To
 install interposer onto processor, first ground yourself, then
 remove processor and interposer from packaging remembering to
 avoid contact with the pins. Remove processor fan assembly by
 gently squeezing together the two retaining clips. Keeping the
 retainer clips squeezed together, slowly lift up the corner,
 pivoting it against the opposite corner. When the fan assembly
 is approximately at a 45 degree angle, left straight up from
 the processor. Aligning the pins of the overdrive to the
 interposer socket, firmly and evenly press the processor into
 the interposer. There should be a slight gap between interposer
 and processor. Reconnect fan to processor. Remove 486 processor
 using chip removing tool. Line the blunt edge of Pentium
 processor with that of the processor socket in the system.
 once all pins are aligned in the socket, lock socket release
 arm into place and secure it. Restart system. System will boot
 to configuration error. Boot system to Reference diskette.

 NOTE: The processor is labeled 0 MHz on reference diskette
 configuration. Save configuration, and Restart the system.

 WORKAROUND:

 Booting the system to the reference diskette and saving the
 configuration will correct the 174 error at POST. No workaround
 for Diagnostics, and 0 MHz processor speed.

 DETAILS:

 BIOS and Diagnostic changes are required to fix problem. There
 are no current plans to rewrite either. The system BIOS will
 incorrectly label processor, but processor will run at proper
 speed.

 TRADEMARKS:

 Other company, product and service names may be the trademarks
 or service marks of others.

 SAS KEYWORDS:
    PSY2               D/T9585            SERVER             UNCLASSIFIED
    CPU                PROCESSOR          OVERDRIVE          HLPCT_9148
    PENTIUM            INTERPOSER




DATE: January 15, 1999