IBM IntelliStation Z Pro 6223, User Manual, Page: 87 / 134

Power-on self-test (POST)
When you turn on the computer, the power-on self-test (POST) performs a series of
tests to check the operation of system components and some of the installed
options.
If POST finishes without detecting any problems, the first window of your operating
system or application program opens.
If POST detects a problem, more than one beep sounds and an error message
appears on the screen.
Notes:
1. If you have set a user password, you must type the password and press Enter,
when prompted, before the operating system will start.
2. A single problem might cause several error messages. When this occurs, work
to correct the cause of the first error message. After you correct the cause of
the first error message, the other error messages usually will be resolved the
next time you run the test.
POST beep codes
Use the following beep code descriptions to help diagnose and solve problems that
are detected during startup:
No beeps
If no beep occurs after the computer completes POST, call for service.
Continuous beep
The startup (boot) microprocessor has failed, or the system board or
speaker subsystem might contain a failing component. If the computer
continues through POST with no errors, call for service. If no video appears,
the startup processor has failed.
Beep codes for specific failures
Beep codes indicating specific system problems are listed in the following
table.
Table 4. POST beep codes
Beep code Description Action
1-1-3 CMOS write/read test has failed. Call for service
1-1-4 BIOS EEPROM checksum has failed.
1-2-1 Programmable interval timer test has failed.
1-2-2 DMA initialization has failed.
1-2-3 DMA page register write/read test has failed.
1-3-1 First 64 Kb RAM test has failed. Reseat the
memory modules
or install a
memory module. If
the problem
remains, call for
service.
Chapter 5. Solving problems
73