Chapter 5: Advanced Motherboard Setup
5-19
LED
Color
Green
Yellow
Definition
Connected
Active
100 Mb LAN LED
Indicators (LAN1/LAN2)
5-9
Onboard Indicators
LAN1/LAN2 LEDs
Each of the Ethernet ports (located beside the VGA port) has a yellow and
a green LED. See the table below for the functions associated with these
LEDs.
LED1/LED2 (Debug LEDs)
The two surface-mounted debug LEDs (LED1 and LED2) are each com-
posed of four individual LEDs, which are used to provide POST code infor-
mation. 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). The description below for reading the
LEDs is when viewed from the top/front side of the chassis.
LED1
1
4
8
1
4
8
2
2
LED2
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 LED2 to
get the high digit and those in LED1 to
get the low digit of the corresponding
hexidecimal PO ST code.
Exam ple:
The example on the left indicates a
hexidecimal PO ST code of C6. This is
determined in the following manner:
LED2 (left digit): 8 + 4 = 12
(decimal 12 = hexidecimal C)
LED1 (right digit): 4 + 2 = 6
Decim al
Hexidecim al Equivalent
0-9
0-9
10
A
11
B
12
C
13
D
14
E
15
F
= Unilluminated LED
Bac k of motherboard
LED1
1
4
8
1
4
8
2
2
LED2
= Illuminated LED (1)
Com mon POST Codes:
The following is a list of the most
common PO ST codes that you may see.
POST Code
Meaning
01
Displayed while in
BIOS Setup
31
No video card
40
Displayed while
counting memory
83
Displayed when
memory count is
finished
85
CMOS Clear
95
Displayed while
detecting IDE
devices
DE
No memory
DE
W rong type of
memory installed
DE
One memory
module (two
minimum required)
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