![IBM pSeries 670 Service Manual Download Page 281](http://html2.mh-extra.com/html/ibm/pseries-670/pseries-670_service-manual_4208211281.webp)
MAP 1542: I/O Problem Isolation
This MAP is used to locate defective FRUs not found by normal diagnostics. For this procedure,
diagnostics are run on a minimally configured system. If a failure is detected on the minimally configured
system, the remaining FRUs are exchanged one at a time until the failing FRU is identified. If a failure is
not detected, FRUs are added back until the failure occurs. The failure is then isolated to the failing FRU.
This I/O problem-determination MAP isolates I/O card and I/O subsystem failures. When I/O problem
isolation is complete, all cables and cards exhibiting a failure will have been replaced or reseated.
Notes:
1. This MAP assumes that a CD-ROM drive is installed in the media subsystem and connected to a SCSI
adapter in the first I/O subsystem, and that a Diagnostics CD-ROM is available.
2. If a general-access password or privileged-access password is installed, you are prompted to enter the
password before the diagnostic CD-ROM can load.
3. The term
POST indicators
refers to the device mnemonics (words
Memory
,
Keyboard
,
Network
,
SCSI
, and
Speaker
) that appear on the system console during the power-on self-test (POST).
4. The service processor may have recorded one or more symptoms in its error log. It is a good idea to
examine that error log before proceeding (see “System Information Menu” on page 724).
5. The service processor may have been set by the user to monitor system operations and to attempt
recoveries. You can disable these actions while you diagnose and service the system. If you disable
them, make notes of their current settings so that you can restore them easily. The following table lists
the settings:
Surveillance
From the service processor Setup Menu, go to the
Surveillance Setup Menu and disable surveillance.
(Operating System Surveillance is disabled in partition
mode.)
Unattended Start
From the service processor System Power Control Menu,
disable unattended start mode.
Reboot Policy
From the System Power Control Menu, go to the
Reboot/Restart Policy Setup Menu and set:
a. Number of reboot attempts to
0
(zero)
b. Use OS-Defined restart policy to
No
c. Enable supplemental restart policy to
No
.
Call Out
From the Call-In/Call-Out Setup Menu, go to the Serial
Port Selection Menu and disable call-out on both serial
ports.
The steps in this MAP will attempt to slow boot the system into service mode diagnostics. The following
procedure describes booting a nonpartitioned system with an attached 3151 console. The procedure for
booting a partitioned system with an attached HMC is slightly different and is described in “Performing
Slow Boot” on page 345. “Performing Slow Boot” describes the procedure for booting online diagnostics (6
key between the
Keyboard
and
Speaker
indicators) and the following procedure requires booting
standalone diagnostics (5 key between the
Keyboard
and
Speaker
indicators). Therefore, on a partitioned
system, make sure the partition you selected to boot in the following procedure has the CD-ROM allocated
to it, as described in Chapter 6, “Using the Online and Standalone Diagnostics”, on page 699.
Chapter 3. Maintenance Analysis Procedures
261
Summary of Contents for pSeries 670
Page 1: ...pSeries 670 Service Guide SA38 0615 03 ERserver...
Page 2: ......
Page 3: ...pSeries 670 Service Guide SA38 0615 03 ERserver...
Page 12: ...x Eserver pSeries 670 Service Guide...
Page 16: ...xiv Eserver pSeries 670 Service Guide...
Page 18: ...xvi Eserver pSeries 670 Service Guide...
Page 324: ...Yes Go to Step 154A 14 on page 302 304 Eserver pSeries 670 Service Guide...
Page 718: ...698 Eserver pSeries 670 Service Guide...
Page 848: ...L3 Cache Shorts Test Step 4 828 Eserver pSeries 670 Service Guide...
Page 849: ...L3 Cache Shorts Test Step 5 Chapter 9 Removal and Replacement Procedures 829...
Page 851: ...L3 Cache Shorts Test Step 2 Chapter 9 Removal and Replacement Procedures 831...
Page 853: ...L3 Cache Shorts Test Step 4 Chapter 9 Removal and Replacement Procedures 833...
Page 854: ...L3 Cache Shorts Test Step 5 834 Eserver pSeries 670 Service Guide...
Page 971: ...7040 Model 671 Media Subsystem 1 2 3 4 5 6 7 8 9 10 Chapter 10 Parts Information 951...
Page 973: ...Power and SCSI Cables to the Media Subsystem 1 2 3 5 4 6 Chapter 10 Parts Information 953...
Page 986: ...966 Eserver pSeries 670 Service Guide...
Page 990: ...970 Eserver pSeries 670 Service Guide...
Page 1018: ...998 Eserver pSeries 670 Service Guide...
Page 1020: ...1000 Eserver pSeries 670 Service Guide...
Page 1028: ...1008 Eserver pSeries 670 Service Guide...
Page 1031: ......