IBM Aptiva 2156, Hardware Maintenance Service

Page: 67 / 155

2-9
NOTES:
If an error message and incorrect audio response occur, diagnose the error
message first.
If you cannot run the diagnostics program tests but did receive a POST error
code, diagnose the POST error message.
If you did not receive any error message, look for a description of your error
symptoms in “Error Symptoms List” in table 2-3.
Check all power supply voltages, switch, and jumper settings before you
replace the system board. Also check the power supply voltages if you have
a “system no-power” condition. (See “Power Supply Cable Connector
Specifications” on page 5-7 and "Machine Type 2156 System Board Layout"
on page 5-3.)
If you are unable to correct the problem by using the “BIOS Error Codes,
Messages, And Beeps List” table and “Error Symptoms List” table, go to
"Undetermined Problems” on page 2-40.
Table 2-1 BIOS Error Codes, Messages, and Beeps List
BIOS Error Codes,
Messages, beeps Action/FRU
NOTE: To diagnose a problem, first find the BIOS error messages, codes,
or beeps in left column. If directed to a check procedure, replace the FRU
indicated in the check procedure. If no check procedure is indicated, the first
Action/FRU listed in right column is the most likely cause.
POST Error Codes and Messages
161
CMOS battery failed
Load default settings in Setup and reboot the
system.
CMOS battery.
System board.
162
CMOS checksum error
Make sure the equipment (diskette drive,
hard disk drive, keyboard, mouse, etc.) are
connected properly and are set correctly in
BIOS Setup.
Load default settings in setup.
CMOS battery should be replaced.
System board.
164
Memory size error
Make sure the DIMMs are inserted properly.
System board.