Table 1. POST Error Codes (continued)
Code Description Action
111 I/O parity error 2 Go to “IBM Enhanced Diagnostics
program” on page 94 and follow the
instruction to run diagnostics.
129 Level 1 cache error Have the computer serviced.
135 Fan failure Have the computer serviced.
151 Real time clock failure Have the computer serviced.
161 Defective CMOS battery Replace the battery. See “Replacing
the battery” on page 97.
162 A change in device configuration
occurred
1. Verify that all external devices
are turned on.
2. Verify that all devices are
properly installed and securely
connected.
3. If you added, removed, or
changed the location of a device,
save the new configuration in
the Configuration/Setup Utility
program. See “Starting the
Configuration/Setup Utility
program” on page 68 and
“Chapter 4. Using the
Configuration/Setup Utility
program” on page 29 for more
information.
163 Clock not updating Have the computer serviced.
164 CMOS RAM memory size does not
match
Go to “IBM Enhanced Diagnostics
program” on page 94 and follow the
instructions to run diagnostics.
166 Boot block check sum error Have the computer serviced.
167 No processor patch Update the BIOS. See “Updating
system programs” on page 21.
168 Alert on LAN is not working
correctly.
1. Go to “Chapter 4. Using the
Configuration/Setup Utility
program” on page 29 and follow
the instructions to verify that
Alert on LAN is enabled.
2. If Alert on LAN is enabled and
the error persists, have the
computer serviced.
175 System board error Have the computer serviced.
74 User Guide
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