Lenovo ThinkCentre M50 Hardware Maintenance Manual (HMM) - Page 17

General, Checkout

Page 17 highlights

Chapter 3. General Checkout Note: The fans in this system may turn off under normal operation. This is a noise-level reduction feature, and should not be taken to mean there is something wrong with the system. The following tools are available to help identify and resolve hardware-related problems. v IBM Setup Utility program v Power-On Self-Test (POST) - POST Beep Codes - Error Code Format v IBM Enhanced Diagnostics program v Product recovery utility - Factory Contents - Partial recovery v Repair utility Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence changed. Be extremely careful during write operations such as copying, saving or formatting. Data or programs can be overwritten if you select an incorrect drive. Diagnostic error messages appear when a test program finds a problem with a hardware option. For the test programs to properly determine if a test Passed, Failed or Aborted, the test programs check the error-return code at test completion. See Chapter 4, "IBM Enhanced Diagnostics," on page 15. General error messages appear if a problem or conflict is found by an application program, the operating system, or both. For an explanation of these messages, refer to the information supplied with that software package. Notes: v By default, the computer starts up quiet (no beep and no memory count and checkpoint code display) when no errors are detected by POST. v To enable beep and memory count and checkpoint code display when a successful POST occurs, do the following: 1. Select Start Options in the IBM Setup Utility program (see Chapter 5, "IBM Setup Utility program," on page 19). 2. Set Power-On Self-Test to Enhanced. v Before replacing any FRUs, ensure that the latest level of BIOS is installed on the system. A down-level BIOS might cause false errors and unnecessary replacement of the system board. For more information on how to determine and obtain the latest level BIOS, see "BIOS levels" on page 112.. v If multiple error codes are displayed, diagnose the first error code displayed. © Copyright IBM Corp. 2005 11

  • 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
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290

Chapter
3.
General
Checkout
Note:
The
fans
in
this
system
may
turn
off
under
normal
operation.
This
is
a
noise-level
reduction
feature,
and
should
not
be
taken
to
mean
there
is
something
wrong
with
the
system.
The
following
tools
are
available
to
help
identify
and
resolve
hardware-related
problems.
v
IBM
Setup
Utility
program
v
Power-On
Self-Test
(POST)
POST
Beep
Codes
Error
Code
Format
v
IBM
Enhanced
Diagnostics
program
v
Product
recovery
utility
Factory
Contents
Partial
recovery
v
Repair
utility
Attention:
The
drives
in
the
computer
you
are
servicing
might
have
been
rearranged
or
the
drive
startup
sequence
changed.
Be
extremely
careful
during
write
operations
such
as
copying,
saving
or
formatting.
Data
or
programs
can
be
overwritten
if
you
select
an
incorrect
drive.
Diagnostic
error
messages
appear
when
a
test
program
finds
a
problem
with
a
hardware
option.
For
the
test
programs
to
properly
determine
if
a
test
Passed
,
Failed
or
Aborted
,
the
test
programs
check
the
error-return
code
at
test
completion.
See
Chapter
4,
“IBM
Enhanced
Diagnostics,”
on
page
15.
General
error
messages
appear
if
a
problem
or
conflict
is
found
by
an
application
program,
the
operating
system,
or
both.
For
an
explanation
of
these
messages,
refer
to
the
information
supplied
with
that
software
package.
Notes:
v
By
default,
the
computer
starts
up
quiet
(no
beep
and
no
memory
count
and
checkpoint
code
display)
when
no
errors
are
detected
by
POST.
v
To
enable
beep
and
memory
count
and
checkpoint
code
display
when
a
successful
POST
occurs,
do
the
following:
1.
Select
Start
Options
in
the
IBM
Setup
Utility
program
(see
Chapter
5,
“IBM
Setup
Utility
program,”
on
page
19).
2.
Set
Power-On
Self-Test
to
Enhanced
.
v
Before
replacing
any
FRUs,
ensure
that
the
latest
level
of
BIOS
is
installed
on
the
system.
A
down-level
BIOS
might
cause
false
errors
and
unnecessary
replacement
of
the
system
board.
For
more
information
on
how
to
determine
and
obtain
the
latest
level
BIOS,
see
“BIOS
levels”
on
page
112..
v
If
multiple
error
codes
are
displayed,
diagnose
the
first
error
code
displayed.
©
Copyright
IBM
Corp.
2005
11