IBM 7940, Руководство по диагностике и обслуживанию

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v
Power cord
v
Three cooling fans
The following illustration shows the locations of the power-supply LEDs.
USB connectors (4) Ethernet
connectors
(2) LAN activity LED
Link LED
Video
connector Power-cord
connector
Serial connector
AC power LED
DC power LED
System locator LED
NMI switch
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs and the power-on LED on the operator
information panel and suggested actions to correct the detected problems.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See Chapter 3, “Parts listing, Type 7940 and 7941 servers,” on page 19 to determine which components
are customer replaceable units (CRU) and which components are field replaceable units (FRU).
v
If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Power-supply
LEDs
Operator
information
panel
power-on
LED
Description Action AC DC
Off Off Off No power to the
server, or a problem
with the ac power
source.
1. Check the ac power to the server.
2. Make sure that the ac power cord is connected to a
functioning power source.
Lit Off Off DC source power
problem.
1. View the BMC system event log (see “Error logs” on
page 76).
2. Replace the power supply (see “Removing the power
supply” on page 46).
3. (Trained service technician only) Replace the system
board (see “Removing the system board” on page
64).
Lit Lit Off Standby power
problem.
1. Reseat the operator information panel signal cable.
2. Replace the operator information panel signal cable.
3. Replace the operator information panel (see
“Removing the operator information panel” on page
49).
4. (Trained service technician only) Replace the system
board (see “Removing the system board” on page
64).
Lit Lit Flashing The power is good. The server is not powered on. No action is necessary.
Lit Lit Lit The power is good. The server is powered on. No action is necessary.
100
IBM System x3455 Type 7940 and 7941: Problem Determination and Service Guide