IBM 84885BU User Manual - Page 137

Undetermined, problems

Get IBM 84885BU PDF manuals and user guides View all IBM 84885BU manuals
Add to My Manuals
Save this manual to your list of manuals

Page 137 highlights

Undetermined problems Use the information in this section if the diagnostic tests did not identify the failure, the devices list is incorrect, or the system is inoperative. Damaged data in CMOS memory or damaged BIOS code can cause undetermined problems. To reset the CMOS data, use the CMOS recovery jumper to override the power-on password and clear the CMOS memory; see "Erasing a lost or forgotten password (clearing CMOS)" on page 19. If you suspect that the BIOS code is damaged, see "Recovering from a POST/BIOS update failure" on page 18. Check the LEDs on all the power supplies. If the LEDs indicate the power supplies are working correctly, complete the following steps: 1. Turn off the server. 2. Be sure the server is cabled correctly. 3. Remove or disconnect the following devices (one at a time) until you find the failure (turn on the server and reconfigure each time): v Any external devices v Surge suppressor device (on the server) v Modem, printer, mouse, or non-IBM devices v Each adapter v Drives v Memory modules (minimum requirement = 512 MB (2 banks of 256 MB DIMMs)) Note: Minimum operating requirements are: a. One power supply b. Power cage assembly, if installed c. System board d. One microprocessor e. Memory module (with a minimum of two 256 MB DIMMs) 4. Turn on the server. If the problem remains, suspect the following FRUs in the order listed: v Power supply v Power cage assembly, if installed v System board Notes: 1. If the problem goes away when you remove an adapter from the system and replacing that adapter does not correct the problem, suspect the system board. 2. If you suspect a networking problem and all the system tests pass, suspect a network cabling problem external to the system. Chapter 6. Symptom-to-FRU index 127

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
Undetermined
problems
Use
the
information
in
this
section
if
the
diagnostic
tests
did
not
identify
the
failure,
the
devices
list
is
incorrect,
or
the
system
is
inoperative.
Damaged
data
in
CMOS
memory
or
damaged
BIOS
code
can
cause
undetermined
problems.
To
reset
the
CMOS
data,
use
the
CMOS
recovery
jumper
to
override
the
power-on
password
and
clear
the
CMOS
memory;
see
“Erasing
a
lost
or
forgotten
password
(clearing
CMOS)”
on
page
19.
If
you
suspect
that
the
BIOS
code
is
damaged,
see
“Recovering
from
a
POST/BIOS
update
failure”
on
page
18.
Check
the
LEDs
on
all
the
power
supplies.
If
the
LEDs
indicate
the
power
supplies
are
working
correctly,
complete
the
following
steps:
1.
Turn
off
the
server.
2.
Be
sure
the
server
is
cabled
correctly.
3.
Remove
or
disconnect
the
following
devices
(one
at
a
time)
until
you
find
the
failure
(turn
on
the
server
and
reconfigure
each
time):
v
Any
external
devices
v
Surge
suppressor
device
(on
the
server)
v
Modem,
printer,
mouse,
or
non-IBM
devices
v
Each
adapter
v
Drives
v
Memory
modules
(minimum
requirement
=
512
MB
(2
banks
of
256
MB
DIMMs))
Note:
Minimum
operating
requirements
are:
a.
One
power
supply
b.
Power
cage
assembly,
if
installed
c.
System
board
d.
One
microprocessor
e.
Memory
module
(with
a
minimum
of
two
256
MB
DIMMs)
4.
Turn
on
the
server.
If
the
problem
remains,
suspect
the
following
FRUs
in
the
order
listed:
v
Power
supply
v
Power
cage
assembly,
if
installed
v
System
board
Notes:
1.
If
the
problem
goes
away
when
you
remove
an
adapter
from
the
system
and
replacing
that
adapter
does
not
correct
the
problem,
suspect
the
system
board.
2.
If
you
suspect
a
networking
problem
and
all
the
system
tests
pass,
suspect
a
network
cabling
problem
external
to
the
system.
Chapter
6.
Symptom-to-FRU
index
127