Lenovo ThinkPad T420 Hardware Maintenance Manual - Page 53

Symptom-to-FRU index, Numeric error codes, This index can also help you determine

Get Lenovo ThinkPad T420 PDF manuals and user guides View all Lenovo ThinkPad T420 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 53 highlights

Symptom-to-FRU index This section contains following information: • "Numeric error codes" on page 47 • "Error messages" on page 49 • "Beep symptoms" on page 50 • "No-beep symptoms" on page 50 • "LCD-related symptoms" on page 50 • "Intermittent problems" on page 52 • "Undetermined problems" on page 52 The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type. Note: Do the FRU replacement or other actions in the sequence shown in the column headed "FRU or action, in sequence." If replacing a FRU does not solve the problem, put the original part back in the computer. Do not replace a nondefective FRU. This index can also help you determine, during regular servicing, what FRUs are likely to need to be replaced next. A numeric error is displayed for each error detected in POST or system operation. In the displays, n can be any number. If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not described there, go to "Intermittent problems" on page 52. Note: For a device not supported by diagnostic codes in the ThinkPad Notebooks, see the manual for that device. Numeric error codes Table 2. Numeric error codes Symptom or error FRU or action, in sequence 0177 Bad SVP data, stop POST task-The checksum of the supervisor password in the EEPROM is not correct. System board. 0182 Bad CRC2. Enter the ThinkPad Setup program and load Setup defaults.-The checksum of the CRS2 setting in the EEPROM is not correct. 1. Run the ThinkPad Setup program. Press F9, and Enter to load the default setting. Then save the current setting by pressing F10. 2. System board. 0183 Bad CRC of Security Settings in EFI Variable. Enter the ThinkPad Setup program. 0187 System board. EAIA data access error-The access to EEPROM is failed. 0188 Invalid RFID Serialization Information Area. System board. 0189 Invalid RFID configuration information area-The EEPROM checksum is not correct. System board. 0190 Critical low-battery error 1. Charge the battery pack. 2. Battery pack. Chapter 4. Related service information 47

  • 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
Symptom-to-FRU index
This section contains following information:
•
“Numeric error codes” on page 47
•
“Error messages” on page 49
•
“Beep symptoms” on page 50
•
“No-beep symptoms” on page 50
•
“LCD-related symptoms” on page 50
•
“Intermittent problems” on page 52
•
“Undetermined problems” on page 52
The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most
likely cause is listed first, in boldface type.
Note:
Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or
action, in sequence.” If replacing a FRU does not solve the problem, put the original part back in the
computer. Do not replace a nondefective FRU.
This index can also help you determine, during regular servicing, what FRUs are likely to need to be
replaced next.
A numeric error is displayed for each error detected in POST or system operation. In the displays,
n
can
be any number.
If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not
described there, go to “Intermittent problems” on page 52.
Note:
For a device not supported by diagnostic codes in the ThinkPad Notebooks, see the manual for that device.
Numeric error codes
Table 2. Numeric error codes
Symptom or error
FRU or action, in sequence
0177
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
System board.
0182
Bad CRC2. Enter the ThinkPad Setup program and load
Setup defaults.—The checksum of the CRS2 setting in
the EEPROM is not correct.
1.
Run the ThinkPad Setup program. Press F9, and
Enter to load the default setting. Then save the
current setting by pressing F10.
2. System board.
0183
Bad CRC of Security Settings in EFI Variable. Enter the
ThinkPad Setup program.
0187
EAIA data access error—The access to EEPROM is failed.
System board.
0188
Invalid RFID Serialization Information Area.
System board.
0189
Invalid RFID configuration information area—The
EEPROM checksum is not correct.
System board.
0190
Critical low-battery error
1.
Charge the battery pack.
2. Battery pack.
Chapter 4
.
Related service information
47