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POST Error Code FRU/Action
151Real-time clock failure
1. System Board
161Bad CMOS battery
1. Run Setup
2. CMOS Backup Battery (see “Safety
information” on page 185)
3. System Board
162Configuration 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 “Safety
information” on page 185)
System Board
5. System Board
162And unable to run diagnostics
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
163Clock not updating or invalid time set
1. Time and Date Set?
2. CMOS Backup Battery (see “Safety
information” on page 185)
3. System Board
164POST detected a base memory or extended
memory size mismatch error or RIMM socket 3 is
populated with a RIMM memory module
1. Run Setup. Check System Summary menu for
memory size change. (See“Setup Utility
program” on page 122.)
2. Run the Extended Memory Diagnostic tests
166Boot Block Check Sum Error
1. Run Flash Recovery using Boot Block. See
“Flash recovery boot block jumper” on page
131.
2. System Board
167Microprocessor installed that is not supported
by the current POST/BIOS
1. Run Setup. Check Stepping level for the
BIOS level needed, then perform the flash
update.
2. Processor
168Alert on LAN error
1. Run Setup. Check to see that Ethernet and
Alert on LAN are enabled.
2. System Board
17X, 18X
1. C2 Security
154 Hardware Maintenance Manual: IBM NetVista Computer Types 6058, 6059, 6269, 6568, 6569, 6578, 6579, 6648,
6649