System-Board Leds And Controls - Lenovo NeXtScale nx360 M4 Installation And Service Manual

System-board LEDs and controls

The following illustration shows the light-emitting diodes (LEDs) on the system board.
Any error LED can be lit after ac power has been removed from the system-board tray so that you can
isolate a problem. After ac power has been removed from the system-board tray, power remains available
to these LEDs for up to 90 seconds. To view the error LEDs, press and hold the light path button on the
system board to light the error LEDs. The error LEDs that were lit while the system-board tray was running
will be lit again while the button is pressed.
The following illustration shows the LEDs and controls on the system board.
HDD 0-3 Error LEDs
DIMM 4-3 error LEDs
DIMM 8-7 error LEDs
Microprocessor 2
error LED
Ethernet card
error LED
RTMM hearbeat LED
Figure 11. LEDs and controls on system board
Microprocessor mismatch LED
IMM hearbeat LED
Chapter 1
Microprocessor 1 error LED
DIMM 2-1 error LEDs
DIMM 6-5 error LEDs
System board
error LED
Lightpath LED
Battery error LED
Slot 1 error LED
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The IBM NeXtScale nx360 M4 Compute Node Type 5455
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