About POST

When the server module is powered on or booted, it goes through a series of hardware tests called Power-On Self Tests (POST). As the POST executes, enters, and exits the various hardware tests (memory, ports, etc.) it generates a series of four-digit hexadecimal codes that you can read at the bottom right corner of the system’s VGA screen (the POST needs to advance past the video initialization). In general, the POST codes change so rapidly that it is difficult to use them as a diagnostic tool. However, when the server encounters a problem, it stops the boot process and displays the last code. You can reference the code against the listing at Table 2.

An alternate method of displaying POST codes is to redirect the output of the console to a serial port (see Viewing POST Codes Using ILOM).