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5-9
Onboard Indicators
GLAN1/GLAN2 LEDs
Each of the Ethernet ports (located beside the VGA port) has a yellow and
a green LED. See the tables below for the functions associated with these
LEDs.
On each Gb LAN (GLAN) port, the yellow LED indicates activity
while the other LED may be green, orange or off to indicate the speed of
the connection (as specified in the tables below).
Gb LAN Left LED
Indicator
LED
Color
Off
Yellow
Debug LEDs
Two sets of surface-mounted debug LEDs are located beside the GLAN2
port and are each composed of four individual LEDs (D1 through D8) ,
which are used to provide POST code information. See the diagrams below
for reading the debug LEDs and refer to Appendix B for a complete list of
POST codes (a partial listing of the most common codes are given below).
Back of motherboard
8
8
4
4
2
2
1
1
D5-D8
D1-D4
8
8
4
4
2
2
1
1
D5-D8
D1-D4
= Unilluminated LED
= Illuminated LED (1)
Definition
Not Active
Active
Reading the Debug LEDs:
W hen on, each of the eight separate
LEDs represent the value of the
number shown beside it in the
diagram. Add up the numerical values
of each illuminated LED in the D5-D8
row to get the high digit (left) and
those in the D1-D4 row to get the low
(right) digit of the corresponding
hexidecimal PO ST code.
Example:
The example on the left indicates a
hexidecimal PO ST code of C6. This is
determined in the following manner:
D1-D4 (right digit): 4 + 2 = 6
D5-D8 (left digit): 8 + 4 = 12
(decimal 12 = hexidecimal C)
Decimal
Hexidecimal Equivalent
0-9
0-9
10
A
11
B
12
C
13
D
14
E
15
F
Chapter 5: Advanced Motherboard Setup
Gb LAN Right LED
Indicator
LED
Color
Definition
Off
No Connection
Green
100 MHz
Orange
1 GHz
Common POST Codes:
The following is a list of the most
common PO ST codes that you may see.
POST Code
01
31
40
83
85
95
DE
DE
DE
5-19
Meaning
Displayed while in
BIOS Setup
No video card
Displayed while
counting memory
Displayed when
memory count is
finished
CMOS Clear
Displayed while
detecting IDE
devices
No memory
W rong type of
memory installed
One memory
module (two
minimum required)
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