Lenovo ThinkAgile VX 4-Socket 4U Certified Node, User Manual

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System-board LEDs
The following illustration shows the location of light path diagnostic LEDs and light path diagnostic switch on
the system board. These LEDs can often identify the source of an error.
Press the light path diagnostic switch
3
to turn on the system board LEDs for a limited amount of time when
the system board is removed from the chassis.
Figure 150. System-board light path LEDs
Table 40. Light path diagnostics: System-board LED status and actions
LED
Description
Action
1
Processor 2 error LED LED on: An error has occurred with
processor 2. See “Processor problems” on page 253
.
2
System board error
LED
LED on: An error has occurred on the
system board. Complete the following steps:
1. Check the Lenovo XClarity Controller
event log and the system error log for
information about the error.
2. Save the log if necessary, and clear the
log afterward.
3
Light path diagnostic
switch
Press the light path diagnostic switch to
turn on the system board LEDs.
4
Processor 1 error LED LED on: An error has occurred with
processor 1.
See “Processor problems” on page 253
5
Memory module 1
through 24 error LEDs
LED on: An error has occurred with the
designated memory module. See “Memory problems” on page 253
General problem determination procedures
Use the information in this section to resolve problems if the event log does not contain specific errors or the
server is inoperative.
If you are not sure about the cause of a problem and the power supplies are working correctly, complete the
following steps to attempt to resolve the problem:
1. Power off the server.
2. Make sure that the server is cabled correctly.
Chapter 10
.
Problem determination
249