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POST Error Code FRU/Action
135 Fan failure
1. Fan
2. System board
151
System board failure
1. System Board
161
Bad CMOS battery
1. Run Setup
2. CMOS Backup Battery (see “Replacing
the battery” on page 31)
3. System Board
162
Configuration mismatch
1. Run Setup and verify Configuration
2. Had a device been added, removed,
changed location? If not, suspect that
device.
3. Power-on external devices first, then
power-on computer
4. CMOS Backup Battery (see “Replacing
the battery” on page 31)System Board
5. System Board
163
Date and Time Incorrect
1. Time and Date Set
2. CMOS Backup Battery (see “Replacing
the battery” on page 31)
3. System Board
164
Memory Size Error
1. Run Setup. Check System Summary
menu for memory size change. (See
“Starting the IBM Setup Utility
program” on page 19.)
2. Run the Extended Memory Diagnostic
tests
166
Boot Block Check Sum Error
1. Run Flash Recovery using Boot Block.
See “Recovering from a POST/BIOS
update failure” on page 148.
2. System Board
167
No Processor BIOS Update Found
1. Run Setup. Check Stepping level for
the BIOS level needed, then perform
the flash update.
2. Processor
168
Alert on LA
™
N error
1. Run Setup. Check to see that Ethernet
and Alert on LAN are enabled.
2. System Board
17X, 18X
1. C2 Security
175 Primary Copy of Secure Data is
damaged
1. Run the IBM Setup Utility program.
See “Starting the IBM Setup Utility
program” on page 19..
2. System Board
176 The System has been tampered with
1. Covers were removed from the
computer
177
Corrupted Administrator Password
1. System Board
74 Hardware Maintenance Manual