THIS TIP IS NOT APPLICABLE IN EMA (EUROPE, MIDDLE EAST, AFRICA)
  Record number:     H084204
  Device:            D/T8550
  ECA number:        ECA059
  Service code:      33
  Date created:      O91/01/23
  Date last altered: A92/06/16

  Abstract:  ECA059, 8570 AX1/BX1, PARITY CHECK ERRORS


PURPOSE: THIS ECA AUTHORIZES SYSTEM BOARD REPLACEMENT TO CORRECT FALSE SYSTEM
BOARD MEMORY PARITY ERRORS ON SOME 8570 SYSTEMS.

FEATURES:
Type,                  Machines Affected
Model,   With          and/or Feature/Device     B/M to be    Service  System
Stage    B/M           Description               Installed    Hours    Hours

8570     B/MNONE       MOD A61 A21 386 25MHZ     B/MNONE      01.0     01.0
8570     B/MNONE       MOD B61 B21 486 25MHZ     B/MNONE      01.0     01.0

PHYSICAL CHECK: BEFORE INSTALLING HARDWARE FRUS, ALL SOFTWARE FIXES SHOULD BE
APPLIED TO THE INSTALLED OPERATING SYSTEM OF THE 8570 25MHZ SYSTEMS.

TO BE ELIGIBLE FOR ECA059, THE FOLLOWING CONDITIONS MUST BE MET:
1. 8570 MODELS A61 AND A21 (386 / 25MHZ) SYSTEMS MUST BE EXPERIENCING THE
   PARITY CHECK ON SYSTEMS CONTAINING SYSTEM BOARD FRU P/N15F7657, 8570 MODELS
   B61 AND B21 (486 / 25MHZ) SYSTEMS MUST CONTAIN SYSTEM BOARD FRU P/N64F0122.
2. BOTH SYSTEM BOARDS MUST HAVE A DATE CODE OF 8933CP OR HIGHER ON THE MODULE
   LOCATED IN LOCATION U142. DATE CODE INFO: 89 = YEAR, 33 = WEEK OF YEAR,
   CP = PLANT LOCATION.
   MODULE LOCATION: U142 IS THE LONGEST MODULE NEXT TO THE INNER MOST MEMORY
   MODULE SOCKET J17.
   NOTE: THE PROCESSOR CARD DOES NOT HAVE TO BE REMOVED TO SEE THE DATE CODE.
3. THE SYSTEM BOARD MUST HAVE MEMORY INSTALLED IN MORE THAN ONE SYSTEM BOARD
   SOCKET IN ORDER TO EXPERIENCE THIS PROBLEM.


PREREQUISITES: NONE

COMPANION: NONE

CONCURRENT: NONE

DETAIL:
INTERMITTENT ERRORS CAUSED BY THE CONDITION NORMALLY OCCUR AT POST, OR DURING
OPERATION SHORTLY AFTER POST. BECAUSE THIS ERROR IS NORMALLY CAUSED BY
DEFECTIVE MEMORY SIMMS, IT IS RECOMMENDED THAT SYSTEM BOARD MEMORY BE
CONSIDERED BEFORE THE SYSTEM BOARD IS REPLACED.  FAILING MEMORY IS NOT COVERED
BY THIS ECA. ADVANCED DIAGNOSTICS MUST BE RUN SO SOLID HARDWARE FAILURES, NOT
ASSOCIATED WITH THIS FAILURE, CAN BE ELIMINATED. ALL SOFTWARE OPERATING SYSTEMS
SHOULD HAVE THE LATEST UPGRADES APPLIED TO THEM.  FOR EXAMPLE OS.2 1.1 EXTENDED
REQUIRES THE WR03089 CORRECTIVE SERVICE DISKETTE (CSD) AND OS/2 1.2 EXTENDED
REQUIRES THE WR04098 CSD.

THIS ECA COVERS SYSTEM BOARD REPLACEMENT WHEN:
1.  ALL REQUIREMENTS IN THE PHYSICAL CHECK ARE MET.
2.  ALL THE SYMPTOMS OF THE OPERATING SYSTEMS LISTED BELOW ARE MET.

THE FOLLOWING EXAMPLES SHOW HOW VARIOUS OPERATING SYSTEMS DISPLAY THIS PARITY
ERROR:
----------------------------------------------------------------------
ALL LEVELS OF DOS WILL DISPLAY A MESSAGE THAT READS "PARITY CHECK 1"
----------------------------------------------------------------------
OS/2 WILL DISPLAY TRAP ERROR 0002.  THE SCREEN WILL READ "THE SYSTEM DETECTED
A HARDWARE MEMORY ERROR ON THE SYSTEM BOARD.  THE SYSTEM STOPPED.  RUN THE
DIAGNOSTICS SUPPLIED WITH YOUR SYSTEM TO DETERMINE THE CAUSE OF YOUR PROBLEM.
                   **TRAP 0002**
         (OTHER VARIABLE INFORMATION WILL BE HERE)
 ERRCD=0001
         (OTHER VARIABLE INFORMATION WILL BE HERE)
----------------------------------------------------------------
AIX WILL DISPLAY A MESSAGE THAT READS:

   NMI_ERR: MEMORY PARITY ERROR
----------------------------------------------------------------
XENIX AND UNIX WILL DISPLAY A MESSAGE THAT READS:
"PANIC: NMI : ERROR: MEMORY FAILURE - PARITY ERROR"

IF THE XENIX OR UNIX SYSTEMS HAVE A FILE CALLED OEM.O DRIVER OR THEY ARE AT
VERSION 2.34 OR HIGHER THE FOLLOWING MESSAGE WILL ALSO BE INCLUDED.
"NON MASKABLE INTERRUPT, CAUSE = XX"
(THE XX CAN BE ANY CHARACTERS)

NOTES:
FOR THE 8570 MODEL A61 OR A21 ORDER SYSTEM BOARD FRU P/N92F0580.
FOR THE 8570 MODEL B61 OR B21 ORDER SYSTEM BOARD FRU P/N92F0581.

THESE SYSTEM BOARDS ARE NOW THE CURRENT FRU PART NUMBERS AND WILL BE
AUTOMATICALLY SUBSTITUTED FOR OLD FRU PART ORDERS.

RECORD ALL TIME AND MATERIAL TO SERVICE CODE 33, ECA059. IN THE USA, USE OTHER
OFFICE WORKED 990. IN CANADA, DO NOT USE 990; CSR IS TO USE THEIR OWN BRANCH
OFFICE NUMBER.

