A-1
Appendix A: BIOS POST Messages
Appendix A
BIOS POST Messages and LED Indicators
During the Power-On Self-Test (POST), the BIOS will check for problems. If a prob-
lem is found, the BIOS will activate an alarm, turn on LED indicators, or display a
message.
BIOS POST Beep Codes
1 long beep-pause-1 long beep
Memory Module Errors
1 long beep + 2 short beeps
VGA Errors
1 Continuous beep w/FP OH LED on
System Overheat
LE1: Standby PWR LED
LE3/LE4 System Debug Indicators
S
L
M
S
D
P
R
E
P
U
®
LGA 775
CPU
KB/MS
JLAN1
E7230
(North Bridge)
4
n
a
F
24-Pin ATX PWR
ICH7R
South Bridge
Fan6/CPU Fan
8-pin PWR
Battery
USB 1/2
V
G
A
JLAN2
COM2
Floppy
DIMM 2B
PCI-E x8
BIOS
Mukilteo
ID
E
#
1
JPF
DIMM 1B
DIMM 2A
DIMM 1A
Fan1
SATA2
F
an
5
LAN
CTRL2
J
P
L
2
J
P
L
1
WOL
JWOR
r
ez
z
u
B
J L 1
JI
2
C1
L
E
1
JBT1
SATA1
JPG1
Fan3
F
P
C
o
n
tr
o
l
Fan2
J
L
E
D
USB3/4 USB5/6
LAN
CTRL1
SPKR
JI
2
C2
1U IPMI
PCI-33 MHz
S I/O
VGA
Ctrl
PCI-E x4
PCI-33 MHz
L
E
3
L
E
4
SATA3
SATA0
C
O
M
1
State
LE3 Indicator
LE4 Indicator
PWR-ON to POST
Green
On
Yellow
On
ECC Memory Testing
Green
Flash
Yellow
Flash
PCI Bus Initializing
Green
On
Yellow
Flash
VGA Initializing
Green
Flash
Yellow
On
System Normal
(After POST)
Off
N/A
Off
N/A
LE1:
5V Standby PWR LED
Action
On
Standby PWR On Turn off the PWR supply before removing
or installing components
A. LE1
B. LE3
C. LE4
A
B
C
