IBM PS/2 70, Техническое обслуживание оборудования

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12.0 Symptom-to-FRU Index
Error symptoms and the FRUs that might be responsible for the failure are
listed in the "Symptom- to-FRU index." The most-likely failing FRU is
listed first.
If the system displays an error message and gives an incorrect audio
response, start with the FRUs listed for that error message. An "X" in an
error message can be any number.
Note: If you are unable to find an error message, you have an IBM device
with its own service manual or a device not supported by the
advanced diagnostic tests. Refer to the manual for that device.
How to Read POST Error Messages
POST error messages are displayed on the screen as three, four, five, or
eight digits. The error messages that can be displayed as shorter POST
messages are highlighted in this index. Some digits will represent
different information for SCSI errors versus non-SCSI errors.
The following example shows which digits display the shorter POST error
messages and also defines the SCSI information in an eight-digit error
message.
Shorter POST Messages
+-------------------+
¦ ¦ ¦ ¦ ¦
+---------------------------------------+
¦ 0 ¦ 0 ¦ 0 ¦ 0 ¦ 0 ¦ 0 ¦ 0 ¦ 0 ¦
+---------------------------------------+
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
Reserved ¦ ¦ ¦ ¦ ¦ ¦ Size (SCSI)
+---------+ ¦ ¦ Slot Number (SCSI)
Device Code ¦ Logical Unit Number (SCSI)
ID (SCSI)
All SCSI devices are set to a different SCSI ID. Duplicate SCSI ID
settings can generate a false error message. Use the SCSI ID to determine
whether the error message is coming from an internal or an external
device.
Note: The system board for the 25-MHz Model 70 (80386 and 80486) consists
of two FRUs. If you are instructed to replace the system board,
and that does not correct the problem, reinstall the original
system-board, then replace the processor-board.
+------------------------------------------------------------------------+
¦ Symptom/Error ¦ FRU/Action ¦
+------------------------------------+-----------------------------------¦
¦ One or more keys do not work ¦ ¦
¦ ¦ Keyboard ¦
¦ ¦ Keyboard Cable ¦
¦ ¦ System Board ¦
¦ ¦ ¦
+------------------------------------+-----------------------------------¦
¦ Changing colors ¦ Display ¦
+------------------------------------+-----------------------------------¦
¦ No beep and the system is ¦ ¦
¦ otherwise functional. ¦ Speaker Assembly ¦
¦ ¦ System Board ¦
¦ ¦ ¦
+------------------------------------+-----------------------------------¦
¦ No beep and nonfunctional system. ¦ ¦
¦ (See "Undetermined Problem" in ¦ System Board ¦
¦ topic 4.0 before replacing any ¦ Power Supply ¦
¦ FRUs.) ¦ ¦
+------------------------------------+-----------------------------------¦
¦ Continuous beep ¦ ¦
¦ ¦ Power Supply ¦
¦ ¦ System Board ¦
¦ ¦ ¦
+------------------------------------+-----------------------------------¦
¦ Repeating short beeps ¦ ¦
¦ ¦ Keyboard (Stuck Key) ¦
¦ ¦ Power Supply ¦
¦ ¦ System Board ¦
¦ ¦ ¦
+------------------------------------+-----------------------------------¦
¦ One long and one short beep ¦ ¦
¦ ¦ Display Adapter ¦
¦ ¦ System Board ¦
¦ ¦ Power Supply ¦
IBM PS/2 Model 70 HMS
Symptom-to-FRU Index
¦ Copyright IBM Corp. 1991
12.0 - 1