Product guide

IBM Flex System x440 Compute Node 25
Light path diagnostics panel
For quick problem determination when located physically at the server, the x440 offers a 3-step guided
path:
The Fault LED on the front panel
1.
The light path diagnostics panel
2.
LEDs next to key components on the system board
3.
The x440 light path diagnostics panel is visible when you remove the server from the chassis. The panel
is located at the upper right side of the compute node, as shown in Figure 9.
Figure 9. Location of x440 light path diagnostics panel
To illuminate the light path diagnostics LEDs, power off the compute node, slide it out of the chassis, and
press the power button. The power button doubles as the light path diagnostics remind button when the
server is removed from the chassis. The meanings of the LEDs are listed in the following table.
Table 16. Light path diagnostic panel LEDs
LED Meaning
LP The light path diagnostics panel is operational.
S BRD A system board error is detected.
MIS A mismatch has occurred between the processors, DIMMs, or HDDs.
NMI A non-maskable interrupt (NMI) has occurred.
TEMP An over-temperature condition occurred that was critical enough to shut down the server.
MEM A memory fault has occurred. The corresponding DIMM error LEDs on the system board are also lit.
ADJ A fault is detected in the adjacent expansion unit (if installed).