Table 12. System-board-assembly LEDs description (continued)
LED
Description
Action
4. If the problem still remains, contact Lenovo
Support.
5 FPGA heartbeat
LED (green)
The FPGA heartbeat LED helps
you identify the FPGA status.
• Blinking (1Hz) : FPGA is
working normally.
• On or off: FPGA is not
working.
If the FPGA heartbeat LED is always off or always on, do
the following:
1. Replace the processor board.
2. If the problem remains, contact Lenovo Support.
6 DIMM error LED
(yellow)
LED on: an error has occurred to
the DIMM the LED represents.
For more information, see “Memory problems” in User
Guide or Hardware Maintenance Guide.
Leak detection module LED
This topic provides information on the liquid cooling leak detection module LED.
The liquid detection sensor module on the LACM (Liquid Assisted Cooling Module) comes with one LED. The
following illustration shows the LED on the module.
Figure 17. Leak detection LED
The following table describes the status that are indicated by liquid detection sensor module LED.
1 Leak detection LED
Status
Description Action
Solid green
No liquid leakage detected. No action required.
Blinking green Liquid leakage detected.
1. Check for coolant leakage
around the radiator, liquid pipes
and pumps.
2. If coolant leakage found, turn off
the power and remove the
LACM.
3. Contact Lenovo Support.
Chapter 2. Server components 41
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