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2 BMC status LED
This LED indicates the BMC status of your server.
BMC status LED Color
Description
On Green The BMC is not ready.
Off
None
The BMC has no power or fails.
Blinking
Green The BMC is working.
3 - 10 POST code diagnostic LEDs
During the system boot process, the BIOS executes several platform conguration processes, each of
which is assigned a specic hex POST code number. When each conguration routine is started, the BIOS
displays the POST code number through the POST code diagnostic LEDs on the system board. To assist in
troubleshooting a system hang during the POST process, the diagnostic LEDs can be used to identify the
last POST process executed.
The POST code diagnostic LED #0 (callout 4 ) is the LSB and the POST code diagnostic LED #7 (callout 9 )
is the MSB. If a POST code diagnostic LED is lit, it indicates 1 in the binary numeral system; otherwise, it
indicates 0. For example, if POST code diagnostic LEDs
5 , 6 , 9 , and 10 are lit, you can read the number
as the following:
POST code diagnostic LED
9 7 5 3 10 8 6 4
Binary symbol 1 0 1 0 1 0 1 0
The “10101010” indicates a corresponding POST code. For detailed information about the POST code, refer
to the Hardware Maintenance Manual. See “Server documentation” on page 2 for information about the
Hardware Maintenance Manual.
Note: The POST code diagnostic LEDs and POST error code information are intended for trained service
personnel of Lenovo.
Chapter 3. Product overview 51