Problem Solving 5-15
Error Messages
This section describes the POST error codes and messages.

POST Error Codes and Messages

Whenever a recoverable error occurs during POST, BIOS displays a message on the
video display screen and causes the speaker to beep as the message appears. BIOS also
issues a beep code (one long tone followed by two short tones) during POST if the
video configuration fails or if an external ROM module does not have the correct
checksum. The BIOS indicates errors by writing an error code to the PS/2-standard
logging area in the Extended BIOS Data Area, and by displaying a message on the
screen, which is sometimes preceded by the POST Error Code. The error code will also
be logged to the Event Logging area.
Table 5-1 POST Error Codes and Messages is a list of the error codes and messages
written at the start of each POST test. Table 5-2 POST Error Beep Codes is a list of
beep codes issued for each POST test. The devices associated with the POST error
codes are shown in subsection POST Error Code Hardware References that follow.
Table 5-1. POST Error Codes and Messages
On-screen error message Action
100 Timer Channel 2 Error
101 Master Interrupt Controller
102 Slave Interrupt Controller
103 CMOS Battery Failure
Contact your service representative to replace the system
board.
104 CMOS Option not Set Contact your service representative to replace the system
board. (Restart the computer, and then execute SETUP to
correct the setting.)
105 CMOS/GPNV Checksum Bad Execute SETUP to correct the setting.
106 CMOS Display Error Contact your service representative to replace the system
board.
107 Insert Key Pressed
108 Keyboard Locked Message
Release the key.
Reconnect the keyboard.
109 Keyboard Stuck Key Release the key. Try a different keyboard.
If the problem persists, contact your service representative
to replace the system board.
10A Keyboard Interface Error Reconnect the keyboard. Try a different keyboard.
If the problem persists, contact your service
representative to replace the system board.
10B System Memory Size Error Install the DIMMs correctly.
Check if all the installed DIMMs are the same specification.
Contact your service representative to replace the DIMMs.