Lenovo ThinkSystem SR950 V3 - Page 42

Table 18. System I/O board LEDs
LED
Description
Action
1 System error LED
(yellow)
LED on: an error has been
detected on the server.
Causes might include one or
more of the following errors:
• The temperature of the
server reached the non-
critical temperature
threshold.
• The voltage of the server
reached the non-critical
voltage threshold.
• A fan has been detected
to be running at low
speed.
• The power supply has a
critical error.
• The power supply is not
connected to the power.
Check system logs or internal error LEDs to identify the failed
part.
2 System ID LED
(blue)
This LED helps you to visually
locate the server.
A system ID button with LED is also located on the front of the
server. You can press the system ID button to turn on/off or
blink the front and rear ID LEDs.
3 XCC heartbeat
LED (green)
The XCC heartbeat LED
helps you identify the XCC
status.
• Blinking (about one flash
per second) : XCC is
working normally.
• Blinking at other speeds or
always on: XCC is at the
initial phase or is working
abnormally.
• Off: XCC is not working.
If the XCC heartbeat LED is always off or always on, do the
following:
• If XCC cannot be accessed:
1. Re-plug the power cord.
2. Check and ensure that the system I/O board and the
firmware and RoT security module are installed
correctly. (Trained technician only) Reinstall them if
needed.
3. (Trained technician only) Replace the firmware and
RoT security module.
4. (Trained technician only) Replace the system I/O
board.
• If XCC can be accessed, replace the system I/O board.
If the XCC heartbeat LED is always blinking fast over 5
minutes, do the following:
1. Re-plug the power cord.
2. Check and ensure that the system I/O board and the
firmware and RoT security module are installed correctly.
(Trained technician only) Reinstall them if needed.
3. (Trained technician only) Replace the firmware and RoT
security module.
4. (Trained technician only) Replace the system I/O board.
34 ThinkSystem SR950 V3 System Configuration Guide