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 or display a message. The following is
a list of such BIOS messages.
A-1 BIOS POST Beep Codes
Beeps
Error Messages
1 long beep-pause-1 long beep
Memory Module Errors
1 long beep + 2 short beeps
VGA Errors
A-2 LE1: 5V Standby PWR LED
A-3 LE3/LE4 System Debug Indicators
A-4 LED Locations
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
PCI-X#1 100MHz ZCR
PCI-X 133 MHz
S
U
P
E
R
P
D
S
M
4
®
Pentium Dural Core CPU
LGA 775
KB/MS
C
O
M
1
GLAN1
F
a
n
5
E7230
(North Bridge)
LAN
CTRL
J P L 1
SCSI
J L1
SATA1
Fan4
Buzzer
J
L
E
D
ID
E
24-Pin ATX PWR
ICH7R
DIMM#1A (Blue)
DIMM#2A (Black)
DIMM#1B (Blue)
DIMM#2B (Black)
WOL
J B T 1
J F 1
(South Bridge)
J31
J28
JPW2
12-pin PWR
J 3
SATA3
F
an
2
Battery
J 9
J
P
A
1
F
a
n
3
JPA2
PCI-X#2 100MHz
S
C
S
I
C
h
a
n
n
e
l
F
P
C
T
R
L
L E 3
SATA0
SATA2
JWOR
J W D
SPKR
(The Green Slot)
USB
J15
V
G
A
JG1
GLAN2
LAN
CTRL
S I/O
COM2
J P L 2
Printer
Floppy
USB 3/4
USB 5/6
Slot1
Slot2
Slot4
PCI-E x4
Slot5
Slot6
PCI-X 133 MHz
BIOS
PXH
J P 5
J P 6
Slot7
LP IPMI
J
P
G
1
Mukilteo
J A 1
LE1
L E 4
JPF
JPW1
F
an
1
A T I
Rage XL
CPU Fan6
W83792
P
W
3
A. LE1
B. LE3
C. LE4
LE1:
5V Standby PWR LED
Action
On
Standby PWR On Turn off the PWR supply before removing
or installing components
B
A
C
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