HP Kayak XU 04xx HP Kayak XU PC Workstation Technical Reference Manual Hardwar - Page 70

Order in Which the Tests are Performed, An example of an Error, Code Message

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5 Power-On Self-Test and Error Messages Order in Which the Tests are Performed Order in Which the 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 is restarted. If you wish to view the POST details, press and the checkpoint code of the test currently in progress will appear in the upper right corner of the screen, and when POST is completed, the HP Summary Screen showing configuration information for the PC Workstation will appear. 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 (see page 69 for a brief summary). Error codes are no longer displayed. 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 is 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 short message. For this example, the message "keyboard error" is displayed. A table listing the error codes, causes and symptoms is on page 70 . • 52 - Post Checkpoint Code. This checkpoint code indicates that a test has failed at this stage of the POST. A table listing the error codes, causes and symptoms is on page 63 . 62

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62
5
Power-On Self-Test and Error Messages
Order in Which the Tests are Performed
Order in Which the 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 is restarted. If you wish to view the POST details, press
and the checkpoint code of the test currently in progress will appear in
the upper right corner of the screen, and when POST is completed, the HP
Summary Screen showing configuration information for the PC Workstation
will appear.
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 (see
page
69
for a brief summary). Error codes are no longer displayed.
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 is 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 short
message. For this example, the message “keyboard error” is displayed.
A table listing the error codes, causes and symptoms is on
page
70
.
•
52
- Post Checkpoint Code. This checkpoint code indicates that a test has
failed at this stage of the POST.
A table listing the error codes, causes and symptoms is on
page
63
.