Lenovo ThinkServer User Manual page 63

2 BMC status LED
This LED indicates the BMC status of your server.
BMC status LED
On
Off
Blinking
3 - 10 POST code diagnostic LEDs
During the system boot process, the BIOS executes several platform configuration processes, each of
which is assigned a specific hex POST code number. When each configuration 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
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
as the following:
POST code diagnostic LED
Binary symbol
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.
Color
Green The BMC is not ready.
None The BMC has no power or fails.
Green The BMC is working.
4 ) is the LSB and the POST code diagnostic LED #7 (callout
5 6 9
, , , and
9 7 5
1 0 1
Description
10
are lit, you can read the number
3 10 8
0 1 0
.
Chapter 3 Product overview
9 )
6 4
1 0
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