Sun Microsystems Netra X4200 M2, Service Manual

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121
A P P E N D I X
B
BIOS POST Codes
Power-On Self-Test (POST)
The system BIOS provides a rudimentary power-on self-test (POST). The basic
devices required for the server to operate are checked, memory is tested, the LSI
1064 disk controller and attached disks are probed and enumerated, and the onboard
network controllers are initialized.
The progress of the self-test is indicated by a series of POST codes.
These codes are displayed at the bottom right corner of the system’s VGA screen
(once the self-test has progressed far enough to initialize the video monitor).
However, the codes are displayed as the self-test runs and scroll off of the screen too
quickly to be read. An alternate method of displaying the POST codes is to redirect
the output of the console to a serial port (see
“Redirecting Console Output” on
page 121 ).
The message,
BMC Responding
is displayed at the end of POST.
Redirecting Console Output
Use these instructions to access the service processor and redirect the console output
so that the BIOS POST codes can be read.
1. Initialize the BIOS Setup utility by pressing the F2 key while the system is
performing the power-on self-test (POST).
2. When the BIOS Main Menu screen is displayed, select Advanced.