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Undetermined Problem
Check the POST Error History
The system board retains the last three POST error codes in a POST Error
History saved in CMOS memory. Each time a POST error code is detected
at the power-on/power-off cycle, it is added to the bottom of the list in the
POST Error History.
Most recent error
code is listed
at bottom
Figure 2-5. POST Error History Example
To view the POST Error History:
Press F9 when the IBM APTIVA logo appears.
If any POST errors are recorded, the POST Error History is displayed
with the most-recent error shown at the bottom of the list.
To check for the error again, repeat the above steps to add the error to the
list once more. You should see the same POST error code listed in the last
two lines of the POST Error History.
To print a copy of the screen to an attached printer, press Print Screen.
If an error code is present, go to “Index of Symptoms, Messages, Error
Codes, or Beeps” on page 2-9. If no error code is present, continue with
this check.
Check the power supply voltages (see “Power Supply” on page 2-34). If the
voltages are correct, return here and continue with the following steps:
1. Power-off the system unit.
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