118
6 Tests and Error Messages
Order in Which POST Tests Are Performed
Order in Which POST Tests Are Performed
Each time the system is powered on, or a reset is performed, the POST is
executed. The POST process verifies the basic functionality of the system
components and initializes certain system parameters.
The POST starts by displaying a graphic screen of the HP PC Workstation’s
logo when the PC Workstation is restarted. If you wish to view the POST
details, press
to get the HP Summary Screen.
If the POST detects an error, the screen switches to text mode, and a
detailed error message is displayed inside a view system errors screen, in
which the error message utility (EMU) not only displays the error diagnosis,
but the suggestions for corrective action (refer to
page 126
for a brief
summary).
Devices such as memory and newly installed hard disks, are configured
automatically. The user is not requested to confirm the change.
During the POST, the BIOS and other ROM data are copied into high-speed
shadow RAM. The shadow RAM is addressed at the same physical location
as the original ROM in a manner which is completely transparent to
applications. It therefore appears to behave as very fast ROM. This
technique provides faster access to the system BIOS firmware.
An example of an Error
Code Message
The following example explains the different coding messages that appear in
the lower left corner of the screen when the POST detects an error during
startup. For example, if the error 0101 - 52 is displayed.
0101 - Post Error Code failure. This error code is accompanied by a short
message. A table listing the error codes, causes and symptoms is shown on
page 127
.
52 - Post Checkpoint Code. This checkpoint code indicates that a test has
failed at this stage of the POST.
The following table lists the POST checkpoint codes written at the start of
each test and their associated beeps. Refer to
page 130
for more details
about Beep codes during boot.
