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Problem Solving 5-7
Monitoring POST
Each time you turn on the system, the Power-On Self-Test (POST) runs
automatically and checks the system board, processor board, memory,
keyboard, and most installed peripheral devices.
During the memory test, POST displays the amount of memory that it is
able to access and test. Depending on the amount of memory, it may
take several minutes to complete the memory test.
Press F2 to enter SETUP. If you do not press F2 , the above message
remains for a few seconds and the boot process continues.
If POST finds an error, it displays an error message and, in case there is
a problem with the display, puts out a series of long and short beeps.
Write down any beep code emitted. This information is useful to your
service representative.
Refer to the “BIOS User’s Information” section in this chapter for a list
of items to check for each error code and for an explanation of the error
beep codes.
The POST Tests table at the end of this chapter lists keys active during
POST and provides a description of errors that may occur.
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.
Report any error code to your service representative.
POST Keys and Errors
Action/Message Description
If POST Beeps Before Video
Appears Initialization failed before video initialized. Most beep code
errors are fatal; initialization cannot continue. Refer to the
section “BIOS User’s Information” in this chapter.
If Monitor Displays Error Note error; press
F1
to continue boot or
F2
to enter Setup.
Refer to the section “BIOS User’s Information” in this
chapter.
To Enter Setup Setup changes specific options, then writes to CMOS,
NVRAM. Press
F2 during initialization to run Setup. If you
do not press
F2
, the boot process continues.
Enter BOOT Diskette If prompted, insert the boot diskette.