Functional Description
Page 34
3.3.3
Status LEDs
The G25A has two general status LEDs at the front panel which are controlled by the
board controller using SMBus commands.
Table 2.
General status LEDs at front panel
3.3.3.1
Board Status LED
The yellow status LED shows G25A status messages. The LED is controlled by a GPIO pin
of the board controller. It is switched on when the G25A firmware starts, switched off
when the G25A is switched off and flashing when the board is in stand-by (S3) status.
During normal operation the LED can be switched on and off using software.
In case of an error, the LED displays the following error messages by repeatedly flashing
n
times and then pausing for one second:
Table 3.
Error codes signaled by board management controller via LED flashes
Appearance
Label
Color
Function
S
Yellow
Board status LED
H
Blue
Hot-Swap LED
Please refer to the ACPI Specification for more details on the power states
S0 to S5:
Advanced Configuration and Power Interface Specification Version 6.1
January, 2016
Unified EFI Forum
Number of Flashes
Error
1
+3.3 V failure
2
Input voltage failure
3
External power supply failure
4
CPU too hot
5
G25A firmware timeout
>5
Internal error
CompactPCI
CompactPCI
1
L A
H
S
RS
CompactPCI
