HP Kayak XU800 Series, Technical Reference Manual

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115
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 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 123
for a brief summary). Error codes are no longer displayed on
MaxiLife LCD panel.
Devices such as memory and newly installed hard disks, are configured
automatically. The user is not requested to confirm the change. Newly
removed hard disks are detected, and the user is prompted to confirm the
new configuration by pressing
. Note, though, that the POST does not
detect when a hard disk drive has been otherwise changed.
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
This 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. For this example, the message “keyboard error” is displayed on
the screen and MaxiLife LCD panel.
A table listing the error codes, causes and symptoms is on
page 124
.
52 - Post Checkpoint Code. This checkpoint code indicates that a test has
failed at this stage of the POST. If the “Boot Step” option has been validated
in MaxiLife, then Post Checkpoint Codes (in this example, 52) will be
reported to the MaxiLife.