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Problem Solving 5-7
After POST completes, the system beeps once.
If POST finds an error, it displays an error message and, in case there is a problem with
the display, it emits a series of long and short beeps. Write down any beep code
emitted. This information is useful to your service representative.
Refer to the “Error Messages” 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 “Error Messages” in this chapter.
If Monitor Displays Error Note error; press F1 to continue boot or F2 to enter Setup.
Refer to the section “Error Messages” 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.
Verifying Proper Operation of Key System Indicators
As POST determines the system configuration, it tests for the presence of each mass
storage device installed in the system. As each device is checked, its activity indicator
should turn on briefly. Check for the following:
!
Does the diskette drive activity indicator turn on briefly? If not, refer to “Diskette
Drive Activity Indicator Does Not Light”
in this chapter.
!
If a second diskette drive is installed, does its activity indicator turn on briefly? If
not, refer to “Diskette Drive Activity Indicator Does Not Light”
in this chapter.
!
If there is a hard disk drive or SCSI devices installed in the system, does the hard
disk drive activity indicator turn on briefly? If not, refer to
Hard Disk Drive Activity
Indicator Does Not Light in this chapter.
Confirming Loading of the Operating System
Once the system boots up, the operating system prompt appears on the screen. The
prompt varies according to the operating system. If the operating system prompt does
not appear, refer to
Problems with Application Software found later in this chapter.