IBM 8658 User Guide - Page 155

fault, messages, Undetermined, Problems

Page 155 highlights

Bus fault messages Message Failure reading 12C device. Check devices on bus 0. Failure reading 12C device. Check devices on bus 1. Failure reading 12C device. Check devices on bus 2. Failure reading 12C device. Check devices on bus 3. Failure reading 12C device. Check devices on bus 4. Action 1. Replace system board 1. Reseat Power Supply 2. Replace Power supply 3. Replace power supply backplane 4. Replace system board 1. Replace DASD backplane 2. Replace system board 1. Replace system board 1. Replace DIMM 2. Replace system board Undetermined Problems You are here because the diagnostic tests did not identify the failure, the Devices List is incorrect, or the system is inoperative. Notes: 1. If you suspect a software mismatch is causing failures (solid or intermittent), be sure to see "Using the SCSISelect utility program" on page 37. 2. A corrupt CMOS can cause undetermined problems. Check the LEDs on all the power supplies, see"Power supply LED errors" on page 134. If the LEDs indicate the power supplies are working correctly, return here and do the following: 1. Power-off the computer. 2. Be sure the system is cabled correctly. 3. Remove or disconnect the following (one at a time) until you find the failure (power-on the computer and reconfigure each time). v Any external devices v Surge suppressor device (on the computer) v Modem, printer, mouse, or non-IBM devices v Each adapter v Drives v Memory-Modules (Minimum requirement = 512 MB (4x128 MB DIMMs)) Note: Minimum operating requirements are: a. 1 Power Supply b. Power Backplane c. System Board d. 1 Microprocessor and VRM e. 3 Terminator Cards f. Memory Module (with a minimum of 1 bank of 128 MB DIMMs) 4. Power-on the computer. If the problem remains, suspect the following FRUs in the order listed: v Power Supply v Power Backplane v System Board Symptom-to-FRU index 145

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Bus
fault
messages
Message
Action
Failure
reading
12C
device.
Check
devices
on
bus
0.
1.
Replace
system
board
Failure
reading
12C
device.
Check
devices
on
bus
1.
1.
Reseat
Power
Supply
2.
Replace
Power
supply
3.
Replace
power
supply
backplane
4.
Replace
system
board
Failure
reading
12C
device.
Check
devices
on
bus
2.
1.
Replace
DASD
backplane
2.
Replace
system
board
Failure
reading
12C
device.
Check
devices
on
bus
3.
1.
Replace
system
board
Failure
reading
12C
device.
Check
devices
on
bus
4.
1.
Replace
DIMM
2.
Replace
system
board
Undetermined
Problems
You
are
here
because
the
diagnostic
tests
did
not
identify
the
failure,
the
Devices
List
is
incorrect,
or
the
system
is
inoperative.
Notes:
1.
If
you
suspect
a
software
mismatch
is
causing
failures
(solid
or
intermittent),
be
sure
to
see
“Using
the
SCSISelect
utility
program”
on
page
37.
2.
A
corrupt
CMOS
can
cause
undetermined
problems.
Check
the
LEDs
on
all
the
power
supplies,
see“Power
supply
LED
errors”
on
page
134.
If
the
LEDs
indicate
the
power
supplies
are
working
correctly,
return
here
and
do
the
following:
1.
Power-off
the
computer.
2.
Be
sure
the
system
is
cabled
correctly.
3.
Remove
or
disconnect
the
following
(one
at
a
time)
until
you
find
the
failure
(power-on
the
computer
and
reconfigure
each
time).
v
Any
external
devices
v
Surge
suppressor
device
(on
the
computer)
v
Modem,
printer,
mouse,
or
non-IBM
devices
v
Each
adapter
v
Drives
v
Memory-Modules
(Minimum
requirement
=
512
MB
(4x128
MB
DIMMs))
Note:
Minimum
operating
requirements
are:
a.
1
Power
Supply
b.
Power
Backplane
c.
System
Board
d.
1
Microprocessor
and
VRM
e.
3
Terminator
Cards
f.
Memory
Module
(with
a
minimum
of
1
bank
of
128
MB
DIMMs)
4.
Power-on
the
computer.
If
the
problem
remains,
suspect
the
following
FRUs
in
the
order
listed:
v
Power
Supply
v
Power
Backplane
v
System
Board
Symptom-to-FRU
index
145