Intel SE7520BD2 Technical Product Specification

Error Reporting and Handling Intel® Server Board SE7520BD2 Technical Product Specification
120 Revision 1.3
Table 57. POST Error Beep Codes
Number of Beeps Description
1 Memory refresh timer error.
3 Main memory read / write test error.
6 Keyboard controller BAT test error.
Table 58. Troubleshooting BIOS Beep Codes
Number of Beeps Troubleshooting Action
1, 2 or 3 Reseat the memory, or replace with known good modules.
4-7, 9-11 Fatal error indicating a serious problem with the system.
Consult your system manufacturer.
Before declaring the motherboard beyond all hope,
eliminate the possibility of interference by a malfunctioning
add-in card. Remove all expansion cards except the video
adapter.
- If the beep codes are generated even when all other
expansion cards are absent, the motherboard has a serious
problem. Consult your system manufacturer.
- If the beep codes are not generated when all other
expansion cards are absent, one of the add-in cards is
causing the malfunction. Insert the cards back into the
system one at a time until the problem happens again. This
will reveal the malfunctioning add-in card.
8 If the system video adapter is an add-in card, replace or
reseat the video adapter. If the video adapter is an
integrated part of the system board, the board may be
faulty.
5.3.3 Checkpoints
5.3.3.1 System ROM BIOS POST Task Test Point (Port 80h Code)
The BIOS will send a 1-byte hex code to the port 80 before each task.
The port 80 codes provide a troubleshooting method in the event of a system hang during
POST
The value of port 80h will be sent to four tri-color LEDs. This diagnostic LED feature consists of
a hardware decoder and four dual-color LEDs located on the baseboard. During POST, the
LEDs display all normal POST progress codes representing the progress of the BIOS POST.
Each code is represented by a combination of colors from the four LEDs. The LEDs are in pairs
of green and red. The POST progress codes are broken into two nibbles, an upper and a lower
nibble. Each bit in the upper nibble is represented by a red LED; each bit in the lower nibble is
represented by a green LED. If both bits are set in the upper and lower nibble then both red
and green LEDs are lit, resulting in an amber color. Likewise, if both bits are clear then both the
red and green LEDs are off.
In the following example, the BIOS sends a value of ACh to the LEDs. The LEDs are decoded
as follows:

Intel SE7520BD2 Specifications

General

Brand	Intel
Model	SE7520BD2
Category	Server Board
Language	English