User Service Guide, Fourth Edition - Server Expansion Unit

Chapter 4
Troubleshooting
Common Installation Problems
28
OL* LEDs
Cell Board LEDs
There is one green power LED located next to each ejector on the cell board in the server that indicates the
power is good. When the LED is illuminated green, power is being supplied to the cell board and it is unsafe to
remove the cell board from the server.
There is one yellow attention LED located next to each ejector on the cell board in the server. When the yellow
attention LED is flashing, it is safe to remove the cell board from the server.
Figure 4-5 Cell Board LED Locations
Table 4-5 Cell Board OL* LED Indicators
Location LED Driven by State Description
On cell board
(located in the
server cabinet)
Power Cell LPM On Green 3.3V Standby and
Cell_Power_Good
Off 3.3V Standby off, or 3.3V
Standby on and no
Cell_Power_Good
Attention MP through
GPM
Flash Yellow Safe to remove the cell board
from the system
Power LED
Attention LED
12V Standby LED
3.3V Standby LED