IBM 88371RU, Руководство по техническому обслуживанию и устранению неисправностей

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Note: After ac power has been removed from the server, power remains
available to the LEDs for up to 12 hours, after which time you must
turn on the server to supply power to the LEDs.
1) Read Appendix B, “Safety information,” on page 129 and “Installation
guidelines” on page 15.
2) Turn off the server and all attached peripheral devices.
3) Disconnect all power cords and external cables from the back of the
server.
4) Remove the server cover (see “Removing the cover” on page 18).
5) Press and hold the blue light path diagnostic button (see Figure 63) to
illuminate the system board LEDs.
Important: You can press this button for no longer than two minutes to
light the LEDs. After this time, the power to the LEDs is
exhausted.
Note: If no LEDs are lit when you press the light path diagnostic button,
check the light path activity LED; if the light path activity LED
lights while you are pressing the light path diagnostic button, this
indicates that the light path is working properly and that there are
no LEDs lit with this particular error.
c. If the lit LED on the light path diagnostics panel does not refer to a specific
internal component, continue with step 5.
5. Go to the table at “Light path diagnostics errors” on page 93 and find the entry
for the associated lit LED; then, replace the indicated component or take the
indicated action.
Notes:
v The system-error log and the BMC log might contain additional information that will be
helpful before replacing a component.
v
If an LED on the light path diagnostics panel is lit and the system-error LED is not lit, there
is probably an LED problem. Run LED diagnostics (see “Starting the diagnostic programs”
on page 71).
Light Path
activity LED (CR 60)
Light Path diagnostic
button (SW 2)
Figure 63. Lighting the light path LEDs without ac power
Chapter 5. Diagnostics
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