Intel R1000BB Family Service Manual page 20

Server System Features
B - The System Status LED on the front and back panels shows the overall health of the system (green,
blinking green, blinking amber, amber, off).
C - POST Code Diagnostic LEDs on the server board change color or state (off, green, red, and amber)
according to the POST sequence.
D – System power good LED on the server board is illuminated when system power is good.
P – CPU CATERR LED is illuminated when CPU CATERR error occurred.
F - The 12V-STBY LED on the server board is illuminated (green) when power is applied.
M, L, K, J, I and H - Fan Fault LEDs help identify failed and failing fans. The fan fault LEDs turn on
(amber) if there is a fan fault.
E and O - CPU fault LEDs help identify the failure of CPU. The CPU fault LEDs turn on (amber) if there
is a CPU fault.
N and G - DIMM Fault LEDs on the server board help identify failed and failing DIMM slots. The
DIMM fault LEDs turn on (amber) if there is a DIMM fault.
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8 Intel Server System R1000BB Service Guide