Acer Altos R520 Acer Altos R520 User's Guide EN - Page 31

Mainboard diagnostic LED indicators, Description, Color, State

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21 Mainboard diagnostic LED indicators Item Description Color State Description A Diagnostic POST code indicators During the system boot process, BIOS executes a number of platform configuration processes, each of which is assigned a specific hex POST code number. As each configuration routine is started, BIOS will display the given POST code to the POST Code Diagnostic LEDs found on the rear of the mainboard. To assist in troubleshooting a system hang during the POST process, the diagnostic LEDs can be used to identify the last POST process to be executed. Refer to the Diagnostic POST code table on page 142. for a complete description of how these LEDs are read, and a list of all supported POST codes.

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21
Mainboard diagnostic LED indicators
Item
Description
Color
State
Description
A
Diagnostic
POST code
indicators
During the system boot process,
BIOS executes a number of
platform configuration processes,
each of which is assigned a specific
hex POST code number. As each
configuration routine is started,
BIOS will display the given POST
code to the POST Code Diagnostic
LEDs found on the rear of the
mainboard. To assist in
troubleshooting a system hang
during the POST process, the
diagnostic LEDs can be used to
identify the last POST process to
be
executed.
Refer to the Diagnostic POST code
table on page 142. for a complete
description of how these LEDs are
read, and a list of all supported
POST codes.